Internal Revenue Bulletin 2023-51 (PDF rendition): IRS Revenue Procedures

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Bulletin No. 2023–51
December 18, 2023
HIGHLIGHTS
OF THIS ISSUE
These synopses are intended only as aids to the reader in
identifying the subject matter covered. They may not be
relied upon as authoritative interpretations.
ADMINISTRATIVE
Notice 2023-74, page 1484.
Notice 2023-74 provides that calendar year 2023 will be
regarded as a further transition period for purposes of IRS
enforcement and administration of the minimum reporting
threshold for Form 1099-K, Payment Card and Third Party
Network Transactions. With respect to calendar years begin-
ning before January 1, 2024, a third party settlement orga-
nization is not required to report payments in settlement
of third party network transactions with respect to a par-
ticipating payee unless the amount to be reported exceeds
$20,000 and the number of such transactions with that par-
ticipating payee exceeds 200.
ADMINISTRATIVE, INCOME TAX
Rev. Proc. 2023-40, page 1553.
This proposed revenue procedure specifies when information
shown on a return in accordance with the applicable forms
and instructions will be an adequate disclosure for purposes
of reducing an understatement of income tax under section
6662(d) and for purposes of avoiding the section 6694(a)
preparer penalty. This revenue procedure updates Rev. Proc.
2022-41, 2022-50 I.R.B. 527, and applies to any income tax
return filed on 2023 tax forms for a taxable year beginning
in 2023, and to any income tax return filed in 2024 on 2023
tax forms for short taxable years beginning in 2024.
EMPLOYEE PLANS
REG-104194-23, page 1558.
This document sets forth a proposed regulation that would
amend the rules applicable to plans that include cash or
deferred arrangements to provide guidance with respect to
long-term, part-time employees. The proposed regulation
reflects statutory changes made by the SECURE Act and the
SECURE 2.0 Act that relate to long-term, part-time employees.
The proposed regulation would affect participants in, ben-
eficiaries of, employers maintaining, and administrators of
plans that include cash or deferred arrangements. This doc-
ument also provides notice of a public hearing.
Rev. Proc. 2023-37, page 1491.
This revenue procedure sets forth the rules regarding qual-
ified pre-approved plans and section 403(b) pre-approved
plans, and combines, conforms, clarifies, and updates
rules for those plans previously set forth in prior revenue
procedures.
INCOME TAX
Rev. Proc. 2023-38, page 1544.
This revenue procedure updates the procedures under
§ 30D(d)(3) of the Internal Revenue Code (Code) for quali-
fied manufacturers to enter into a written agreement with the
Secretary of the Treasury or her delegate (Secretary) under
which such manufacturer agrees to make periodic written
reports to the Secretary providing vehicle identification num-
bers and other information regarding vehicles eligible for a
clean vehicle credit. Vehicles eligible for the clean vehicle
credit under § 30D of the Code (§ 30D credit), the quali-
fied commercial clean vehicles credit under § 45W of the
Code (§ 45W credit), and the previously-owned clean vehicles
credit under § 25E of the Code (§ 25E credit), generally must
be manufactured by a qualified manufacturer as described
in § 30D(d)(1)(C) and (d)(3). See §§ 45W(c)(1) and 25E(c)
(1)(D)(i). This revenue procedure establishes the procedures
for qualified manufacturers to submit information regarding
vehicles for upfront review by the Department of Energy, to
ensure the vehicles are eligible for the § 30D credit for the
calendar year at issue in accordance with the excluded enti-
ties provision of § 30D(d)(7).
Rev. Rul. 2023-23, page 1472.
2023 Base Period T-Bill Rate. The “base period T-bill rate”
for the period ending September 30, 2023 is published as
required by section 995(f) of the Internal Revenue Code.
Finding Lists begin on page ii.

INCOME TAX, TAX CONVENTION
Rev. Proc. 2023-36, page 1485.
This revenue procedure updates and supersedes Rev. Proc.
2022-35. Ecuador is added to the list of jurisdictions with
which the United States has in effect a relevant information
exchange agreement. Argentina and Kazakhstan are added
to the list of countries with which Treasury and the IRS have
determined it is appropriate to have an automatic exchange
relationship with respect to the information collected under
Treas. Reg. §§ 1.6049-4(b)(5) and 1.6049-8(a).

The IRS Mission
Provide America’s taxpayers top-quality service by helping
them understand and meet their tax responsibilities and
enforce the law with integrity and fairness to all.
Introduction
The Internal Revenue Bulletin is the authoritative instrument
of the Commissioner of Internal Revenue for announcing offi-
cial rulings and procedures of the Internal Revenue Service
and for publishing Treasury Decisions, Executive Orders, Tax
Conventions, legislation, court decisions, and other items of
general interest. It is published weekly.
It is the policy of the Service to publish in the Bulletin all sub-
stantive rulings necessary to promote a uniform application
of the tax laws, including all rulings that supersede, revoke,
modify, or amend any of those previously published in the
Bulletin. All published rulings apply retroactively unless other-
wise indicated. Procedures relating solely to matters of inter-
nal management are not published; however, statements of
internal practices and procedures that affect the rights and
duties of taxpayers are published.
Revenue rulings represent the conclusions of the Service
on the application of the law to the pivotal facts stated in
the revenue ruling. In those based on positions taken in rul-
ings to taxpayers or technical advice to Service field offices,
identifying details and information of a confidential nature are
deleted to prevent unwarranted invasions of privacy and to
comply with statutory requirements.
Rulings and procedures reported in the Bulletin do not have the
force and effect of Treasury Department Regulations, but they
may be used as precedents. Unpublished rulings will not be
relied on, used, or cited as precedents by Service personnel in
the disposition of other cases. In applying published rulings and
procedures, the effect of subsequent legislation, regulations,
court decisions, rulings, and procedures must be considered,
and Service personnel and others concerned are cautioned
against reaching the same conclusions in other cases unless
the facts and circumstances are substantially the same.
The Bulletin is divided into four parts as follows:
Part I.—1986 Code.
This part includes rulings and decisions based on provisions
of the Internal Revenue Code of 1986.
Part II.—Treaties and Tax Legislation.
This part is divided into two subparts as follows: Subpart A,
Tax Conventions and Other Related Items, and Subpart B,
Legislation and Related Committee Reports.
Part III.—Administrative, Procedural, and Miscellaneous.
To the extent practicable, pertinent cross references to these
subjects are contained in the other Parts and Subparts. Also
included in this part are Bank Secrecy Act Administrative
Rulings. Bank Secrecy Act Administrative Rulings are issued
by the Department of the Treasury’s Office of the Assistant
Secretary (Enforcement).
Part IV.—Items of General Interest.
This part includes notices of proposed rulemakings, disbar-
ment and suspension lists, and announcements.
The last Bulletin for each month includes a cumulative index
for the matters published during the preceding months. These
monthly indexes are cumulated on a semiannual basis, and are
published in the last Bulletin of each semiannual period.
The contents of this publication are not copyrighted and may be reprinted freely. A citation of the Internal Revenue Bulletin as the source would be appropriate.
December 18, 2023 Bulletin No. 2023–51

Part I
Section 995.—Taxation
of DISC Income to
Shareholders
2023 Base Period T-Bill Rate. The “base period
T-bill rate” for the period ending September 30,
2023, is published as required by section 995(f) of
the Internal Revenue Code.
Rev. Rul. 2023-23
Section 995(f)(1) of the Internal
Revenue Code provides that a shareholder
of a domestic international sales corpo-
ration (“DISC”) shall pay interest for
each taxable year in an amount equal to
the product of the “shareholder’s DISC-
related deferred tax liability” for the year
(as defined in section 995(f)(2)) and the
“base period T-bill rate.” Under section
995(f)(4), the base period T-bill rate is “the
annual rate of interest determined by the
Secretary to be equivalent to the average
of the 1-year constant maturity Treasury
yields, as published by the Board of
Governors of the Federal Reserve System,
for the 1-year period ending on September
30 of the calendar year ending with (or
of the most recent calendar year ending
before) the close of the taxable year of the
shareholder.”
The base period T-bill rate for the
period ending September 30, 2023, is 4.93
percent.
Pursuant to section 6622 of the Internal
Revenue Code, interest must be com-
pounded daily. The table below provides
factors for compounding the 2023 base
period T-bill rate daily for any number
of days in the shareholder’s taxable year
(including for a 52-53 week taxable year).
To compute the amount of the interest
charge for the shareholder’s taxable year,
multiply the amount of the shareholder’s
DISC-related deferred tax liability for that
year by the base period T-bill rate factor
corresponding to the number of days in
the shareholder’s taxable year for which
the interest charge is being computed.
Generally, one would use the factor for
365 days. One would use a different factor
only if the shareholder’s taxable year for
which the interest charge is being deter-
mined is a short taxable year, if the share-
holder uses a 52-53 week taxable year, or
if the shareholder’s taxable year is a leap
year.
For the base period T-bill rates for peri-
ods ending in prior years, see Rev. Rul.
2022-21, 2022-47 I.R.B. 468; Rev. Rul.
2021-22, 2021-47 I.R.B. 726; Rev. Rul.
2020-25, 2020-48 I.R.B. 1109; Rev. Rul.
2019-27, 2019-51 I.R.B. 1378; Rev. Rul.
2018-31, 2018-50 I.R.B. 848; and Rev.
Rul. 2017-23, 2017-49 I.R.B. 546.
DRAFTING INFORMATION
The principal author of this revenue
ruling is Kate Kerrigan of the Office of
Associate Chief Counsel (International).
For further information regarding the rev-
enue ruling, contact Ms. Kerrigan at (202)
317-3800 (not a toll-free number).
ANNUAL RATE (4.93%), COMPOUNDED DAILY
DAYSFACTOR
10.000135068
20.000270155
30.000405260
40.000540383
50.000675525
60.000810685
70.000945863
80.001081059
90.001216273
100.001351506
110.001486757
120.001622027
130.001757314
140.001892620
150.002027944
December 18, 2023 1472 Bulletin No. 2023–51

ANNUAL RATE (4.93%), COMPOUNDED DAILY
DAYSFACTOR
160.002163286
170.002298647
180.002434026
190.002569423
200.002704839
210.002840273
220.002975725
230.003111195
240.003246684
250.003382191
260.003517716
270.003653260
280.003788822
290.003924402
300.004060001
310.004195618
320.004331253
330.004466906
340.004602578
350.004738268
360.004873977
370.005009704
380.005145449
390.005281212
400.005416994
410.005552794
420.005688613
430.005824450
440.005960305
450.006096178
460.006232070
470.006367980
480.006503909
490.006639856
500.006775821
Bulletin No. 2023–51 1473 December 18, 2023

December 18, 2023 1474 Bulletin No. 2023–51
ANNUAL RATE (4.93%), COMPOUNDED DAILY
DAYSFACTOR
510.006911805
520.007047807
530.007183827
540.007319866
550.007455923
560.007591999
570.007728093
580.007864205
590.008000336
600.008136485
610.008272653
620.008408838
630.008545043
640.008681265
650.008817506
660.008953766
670.009090044
680.009226340
690.009362655
700.009498988
710.009635339
720.009771709
730.009908098
740.010044504
750.010180929
760.010317373
770.010453835
780.010590316
790.010726815
800.010863332
810.010999868
820.011136422
830.011272995
840.011409586
850.011546195

Bulletin No. 2023–51 1475 December 18, 2023
ANNUAL RATE (4.93%), COMPOUNDED DAILY
DAYSFACTOR
860.011682823
870.011819470
880.011956135
890.012092818
900.012229520
910.012366240
920.012502979
930.012639736
940.012776512
950.012913306
960.013050119
970.013186950
980.013323800
990.013460668
1000.013597554
1010.013734459
1020.013871383
1030.014008325
1040.014145286
1050.014282265
1060.014419262
1070.014556278
1080.014693313
1090.014830366
1100.014967438
1110.015104528
1120.015241637
1130.015378764
1140.015515909
1150.015653074
1160.015790256
1170.015927458
1180.016064677
1190.016201916
1200.016339173

December 18, 2023 1476 Bulletin No. 2023–51
ANNUAL RATE (4.93%), COMPOUNDED DAILY
DAYSFACTOR
1210.016476448
1220.016613742
1230.016751054
1240.016888385
1250.017025735
1260.017163103
1270.017300490
1280.017437895
1290.017575319
1300.017712761
1310.017850222
1320.017987702
1330.018125200
1340.018262716
1350.018400252
1360.018537805
1370.018675378
1380.018812969
1390.018950578
1400.019088206
1410.019225853
1420.019363518
1430.019501202
1440.019638905
1450.019776626
1460.019914365
1470.020052124
1480.020189901
1490.020327696
1500.020465510
1510.020603343
1520.020741194
1530.020879064
1540.021016953
1550.021154860

Bulletin No. 2023–51 1477 December 18, 2023
ANNUAL RATE (4.93%), COMPOUNDED DAILY
DAYSFACTOR
1560.021292786
1570.021430731
1580.021568694
1590.021706675
1600.021844676
1610.021982695
1620.022120732
1630.022258789
1640.022396864
1650.022534957
1660.022673070
1670.022811200
1680.022949350
1690.023087518
1700.023225705
1710.023363911
1720.023502135
1730.023640378
1740.023778639
1750.023916920
1760.024055219
1770.024193536
1780.024331872
1790.024470227
1800.024608601
1810.024746993
1820.024885404
1830.025023834
1840.025162283
1850.025300750
1860.025439235
1870.025577740
1880.025716263
1890.025854805
1900.025993366

December 18, 2023 1478 Bulletin No. 2023–51
ANNUAL RATE (4.93%), COMPOUNDED DAILY
DAYSFACTOR
1910.026131945
1920.026270543
1930.026409160
1940.026547796
1950.026686450
1960.026825123
1970.026963815
1980.027102525
1990.027241254
2000.027380002
2010.027518769
2020.027657554
2030.027796358
2040.027935181
2050.028074023
2060.028212883
2070.028351763
2080.028490661
2090.028629577
2100.028768513
2110.028907467
2120.029046440
2130.029185432
2140.029324442
2150.029463471
2160.029602520
2170.029741586
2180.029880672
2190.030019776
2200.030158900
2210.030298042
2220.030437203
2230.030576382
2240.030715581
2250.030854798

Bulletin No. 2023–51 1479 December 18, 2023
ANNUAL RATE (4.93%), COMPOUNDED DAILY
DAYSFACTOR
2260.030994034
2270.031133289
2280.031272562
2290.031411855
2300.031551166
2310.031690496
2320.031829845
2330.031969212
2340.032108599
2350.032248004
2360.032387429
2370.032526872
2380.032666333
2390.032805814
2400.032945314
2410.033084832
2420.033224369
2430.033363925
2440.033503500
2450.033643094
2460.033782707
2470.033922338
2480.034061988
2490.034201658
2500.034341346
2510.034481053
2520.034620778
2530.034760523
2540.034900287
2550.035040069
2560.035179870
2570.035319690
2580.035459529
2590.035599387
2600.035739264

December 18, 2023 1480 Bulletin No. 2023–51
ANNUAL RATE (4.93%), COMPOUNDED DAILY
DAYSFACTOR
2610.035879160
2620.036019075
2630.036159008
2640.036298961
2650.036438932
2660.036578922
2670.036718931
2680.036858959
2690.036999006
2700.037139072
2710.037279157
2720.037419261
2730.037559384
2740.037699525
2750.037839686
2760.037979865
2770.038120063
2780.038260281
2790.038400517
2800.038540772
2810.038681046
2820.038821339
2830.038961651
2840.039101982
2850.039242332
2860.039382701
2870.039523089
2880.039663496
2890.039803922
2900.039944366
2910.040084830
2920.040225313
2930.040365815
2940.040506335
2950.040646875

Bulletin No. 2023–51 1481 December 18, 2023
ANNUAL RATE (4.93%), COMPOUNDED DAILY
DAYSFACTOR
2960.040787433
2970.040928011
2980.041068608
2990.041209223
3000.041349858
3010.041490511
3020.041631184
3030.041771875
3040.041912586
3050.042053315
3060.042194064
3070.042334832
3080.042475618
3090.042616424
3100.042757248
3110.042898092
3120.043038955
3130.043179837
3140.043320737
3150.043461657
3160.043602596
3170.043743554
3180.043884530
3190.044025526
3200.044166541
3210.044307575
3220.044448628
3230.044589701
3240.044730792
3250.044871902
3260.045013031
3270.045154179
3280.045295347
3290.045436533
3300.045577739

December 18, 2023 1482 Bulletin No. 2023–51
ANNUAL RATE (4.93%), COMPOUNDED DAILY
DAYSFACTOR
3310.045718964
3320.045860207
3330.046001470
3340.046142752
3350.046284053
3360.046425373
3370.046566712
3380.046708070
3390.046849447
3400.046990844
3410.047132259
3420.047273694
3430.047415147
3440.047556620
3450.047698112
3460.047839623
3470.047981153
3480.048122702
3490.048264271
3500.048405858
3510.048547465
3520.048689091
3530.048830735
3540.048972399
3550.049114083
3560.049255785
3570.049397506
3580.049539247
3590.049681006
3600.049822785
3610.049964583
3620.050106400
3630.050248237
3640.050390092
3650.050531967

Bulletin No. 2023–51 1483 December 18, 2023
ANNUAL RATE (4.93%), COMPOUNDED DAILY
DAYSFACTOR
3660.050673861
3670.050815773
3680.050957706
3690.051099657
3700.051241627
3710.051383617

December 18, 2023 1484 Bulletin No. 2023–51
Part III
Revised Timeline
Regarding Implementation
of Amended Section
6050W(e)
Notice 2023-74
SECTION 1. PURPOSE
This notice announces that calendar
year 2023 will be regarded as a further
transition period for purposes of Internal
Revenue Service (IRS) enforcement and
administration with respect to the imple-
mentation of the amendments made to the
minimum threshold for reporting by third
party settlement organizations (TPSO)
under section 6050W(e) of the Internal
Revenue Code (Code)
1
by the American
Rescue Plan Act of 2021 (ARP), Public
Law 117-2, 135 Stat. 4 (March 11, 2021).
The transition period described in this
notice is intended to facilitate an orderly
transition for TPSO compliance with sec-
tion 6050W(e) and participating payee
compliance with income tax reporting.
SECTION 2. BACKGROUND
.01 Section 6050W, Returns relating to
payments made in settlement of payment
card and third party network transactions
Section 6050W was added to the Code
by section 3091 of the Housing Assistance
Tax Act of 2008, Div. C of Public Law
110-289, 122 Stat. 2654, 2908, and
requires payment settlement entities to
file an information return for each calen-
dar year with respect to payments made in
settlement of certain reportable payment
transactions. Under section 6050W(a),
the annual information return must set
forth (1) the name, address, and tax-
payer identification number (TIN) of the
participating payee to whom payments
were made and (2) the gross amount of
the reportable payment transactions with
respect to that payee in that calendar year.
Section 1.6050W-1(a)(6) defines “gross
amount” to mean the total dollar amount
of the aggregate reportable payment trans-
actions for each participating payee, with-
out regard to any adjustments for credits,
cash equivalents, discount amounts, fees,
refunded amounts, or any other amounts.
Payment settlement entities required
to make annual information returns under
section 6050W do so by filing Form 1099-
K, Payment Card and Third Party Network
Transactions with the IRS. They are also
required to furnish Form 1099-K to the
participating payee. Forms 1099-K must
be furnished to the participating payees on
or before January 31st of the year follow-
ing the calendar year for which the return
was made. Forms 1099-K must be filed
with the IRS on or before February 28th
(March 31st if filed electronically) of the
year following the calendar year for which
the return was made. See § 6050W(f);
§ 1.6050W-1(g).
Pursuant to section 6050W(c), section
6050W covers two types of reportable
payment transactions: (1) payment card
transactions and (2) third party network
transactions. Section 6050W(c)(3) states
that a third party network transaction
is any transaction for the provision of
goods or services that is settled through a
third party payment network. Under sec-
tion 6050W(b) and § 1.6050W-1(c)(2),
a TPSO is the payment settlement entity
that must report third party network trans-
actions – that is, the transactions for goods
or services that are settled through the
TPSO’s third party payment network – on
Form 1099-K.
Section 6050W(b)(3) defines a TPSO
as the central organization that has the
contractual obligation to make payment
to the participating payees of third party
network transactions. Pursuant to section
6050W(d)(3), a third party payment net-
work is any agreement or arrangement
that (i) involves the establishment of
accounts with a central organization by a
substantial number of providers of goods
or services who are unrelated to the central
organization and who have agreed to set-
tle transactions for the provision of goods
and services with purchasers according
to the terms of agreements; (ii) provides
standards and mechanisms for settling
such transactions; and (iii) guarantees
payments to the providers of goods and
services in settlement of transactions with
the purchasers.
Under section 6050W(d)(1)(A)(ii), a
participating payee, in the case of a third
party network transaction, is any person
who accepts payment from a TPSO in set-
tlement of such transaction.
As originally enacted in 2008, section
6050W(e) provided that a TPSO is not
required to report third party network
transactions with respect to a participating
payee unless the gross amount that would
otherwise be reported exceeds $20,000
and the number of such transactions with
that participating payee exceeds 200.
.02 Section 3406, Backup withholding
Section 3406(a) requires certain payers
to perform backup withholding by deduct-
ing and withholding income tax from a
reportable payment when, among other
circumstances, the payee fails to furnish
the payee’s TIN to the payer or the IRS
has notified the payer that the TIN fur-
nished by the payee is incorrect. Pursuant
to section 3406(b)(3)(F), a reportable pay-
ment includes payments made by a TPSO
that are required to be shown under sec-
tion 6050W on a Form 1099-K. A payer is
required to report the amount of deducted
and withheld Federal income tax amounts
on Form 945, Annual Return of Withheld
Federal Income Tax, and on the informa-
tion return filed with the IRS and furnished
to the payee. In the case of the Form 1099-
K, withheld income tax is reported in box
4. The payee may then claim credit for
the amount of income tax withheld on the
payee’s Federal income tax return.
.03 Section 6721, Failure to file correct
information returns, and section 6722,
Failure to furnish correct payee statements
Section 6721 imposes a penalty for any
failure to file an information return on or
before the required filing date, and for any
failure to include all of the information
required to be shown on the return or the
inclusion of incorrect information.
Section 6722 imposes a penalty for
failure to furnish a payee statement on or
1
Unless otherwise specified, all “section” or “§” references are to sections of the Code or the Income Tax Regulations (26 CFR part 1).

Bulletin No. 2023–51 1485 December 18, 2023
before the required furnishing date to the
person to whom such statement is required
to be furnished, and for any failure to
include all of the information required
to be shown on a payee statement or the
inclusion of incorrect information.
.04 American Rescue Plan Act of 2021
Section 9674 of the ARP amended sec-
tion 6050W(e) to provide that, for Forms
1099-K for calendar years beginning after
December 31, 2021, a TPSO is required
to report payments in settlement of third
party network transactions with respect to
any participating payee that exceed a min-
imum threshold of $600 in aggregate pay-
ments, regardless of the aggregate number
of such transactions.
Notice 2023-10, 2023-3 I.R.B. 403
(January 17, 2023), delayed implementa-
tion of the reporting threshold for TPSOs
in section 9674(a) of the ARP for Forms
1099-K for calendar years beginning
before January 1, 2023. Notice 2023-
10 also provided that the IRS would not
assert penalties under section 6721 or
section 6722 for TPSOs failing to file or
failing to furnish Forms 1099-K unless
the gross amount of aggregate payments
required to be reported exceeded $20,000
and the number of transactions exceeded
200.
SECTION 3. TRANSITION
PERIOD FOR ENFORCEMENT
AND ADMINISTRATION WITH
RESPECT TO CALENDAR YEAR
2023
Calendar year 2023 will be regarded
as a further transition period for purposes
of IRS enforcement and administration of
the information reporting requirements
under section 6050W(e), as amended by
the ARP. For calendar year 2023, a TPSO
is not required to report payments in set-
tlement of third party network transac-
tions with respect to a participating payee
unless (1) the gross amount of aggregate
payments to be reported exceeds $20,000
and (2) the number of such transactions
with that participating payee exceeds 200.
The IRS will not assert penalties under
section 6721 or section 6722 for a TPSO
for failing to file or failing to furnish
Forms 1099-K with respect to a payee
unless the gross amount of aggregate pay-
ments to be reported exceeds $20,000 and
the number of such transactions with that
participating payee exceed 200.
The IRS will not regard calendar year
2023 as a transition period with respect to
the requirements of section 6050W that
were not modified by section 9674(a) of
the ARP, such as provisions relating to
payment card transactions. In addition,
TPSOs that have performed backup with-
holding under section 3406(a) for a payee
during calendar year 2023 must file a Form
945 and a Form 1099-K with the IRS and
furnish a copy to the payee if total report-
able payments to the payee exceeded $600
for the calendar year.
SECTION 4. DRAFTING
INFORMATION
The principal author of this notice is
the Office of Associate Chief Counsel
(Procedure and Administration).
26 CFR 601.601: Rules and regulations
(Also Part 1, §§ 6049; 1.6049-4, 1.6049-8)
Rev. Proc. 2023-36
SECTION 1. PURPOSE
This revenue procedure provides a list
of the jurisdictions with which the United
States has in effect a relevant informa-
tion exchange agreement such that the
reporting requirement of §§ 1.6049-4(b)
(5) and 1.6049-8(a) of the Income Tax
Regulations may apply with respect to
certain deposit interest paid to residents of
such jurisdictions.
This revenue procedure also provides
a list of the jurisdictions with which the
Department of the Treasury (Treasury
Department) and the Internal Revenue
Service (IRS) have determined that it is
appropriate to have an automatic exchange
relationship with respect to the informa-
tion collected under §§ 1.6049-4(b)(5)
and 1.6049-8(a).
These lists are updated and restated
versions of those set forth in Rev. Proc.
2022-35, I.R.B. 2022-40 270. Ecuador
has been added in Section 3 of this reve-
nue procedure to the list of jurisdictions
with which the United States has in effect a
relevant information exchange agreement.
Argentina and Kazakhstan have been
added in Section 4 of this revenue proce-
dure to the list of jurisdictions with which
the Treasury Department and the IRS have
determined that it is appropriate to have an
automatic exchange relationship.
SECTION 2. BACKGROUND
Sections 1.6049-4(b)(5) and 1.6049-
8(a), as revised by TD 9584, 2012-20
I.R.B. 900, require the reporting of certain
deposit interest paid to nonresident alien
individuals on or after January 1, 2013.
Section 1.6049-4(b)(5) provides that in the
case of interest aggregating $10 or more
paid to a nonresident alien individual (as
defined in section 7701(b)(1)(B)) that is
reportable under § 1.6049-8(a), the payor
is required to make an information return
on Form 1042-S, Foreign Person’s U.S.
Source Income Subject to Withholding,
for the calendar year in which the interest
is paid.
Interest that is reportable under
§ 1.6049-8(a) is interest described in sec-
tion 871(i)(2)(A) that relates to a deposit
maintained at an office within the United
States. The regulations also provide that
such deposit interest is reportable only
if paid to a resident of a jurisdiction that
is identified as a jurisdiction with which
the United States has in effect an income
tax or other convention or bilateral agree-
ment relating to the exchange of tax infor-
mation within the meaning of section
6103(k)(4), under which the competent
authority is the Secretary of the Treasury
or the Secretary’s delegate and the
United States agrees to provide, as well
as receive, information. Finally, the reg-
ulations provide that jurisdictions are so
identified in an applicable revenue proce-
dure (see § 601.601(d)(2)) as of December
31 before the calendar year in which the
interest is paid. The preamble to the reg-
ulations (at 2012-20 I.R.B. 901-02) notes
that the IRS will not exchange information
with another jurisdiction, even if an infor-
mation exchange agreement is in effect, if
there are concerns about confidentiality,
safeguarding of data exchanged, the use
of the information, or other factors that
would make the exchange of information
inappropriate.
Rev. Proc. 2012-24, 2012-20 I.R.B. 913,
was published contemporaneously with
the publication of TD 9584 to provide a

December 18, 2023 1486 Bulletin No. 2023–51
list of those jurisdictions with which the
United States has in effect an information
exchange agreement, such that interest paid
to residents of such jurisdictions must be
reported by payors to the extent required
under §§ 1.6049-4(b)(5) and 1.6049-8(a),
and to provide a separate list identifying
those jurisdictions with which the auto-
matic exchange of the information collected
under the regulations has been determined
by the Treasury Department and the IRS to
be appropriate. Before issuance of this Rev.
Proc. 2023-36, the most current versions
of those lists were set forth in Rev. Proc.
2022-35.
SECTION 3. JURISDICTIONS OF
RESIDENCE WITH RESPECT TO
WHICH THE DEPOSIT INTEREST
REPORTING REQUIREMENT
APPLIES
The following are the jurisdictions
with which the United States has in effect
an income tax or other convention or bilat-
eral agreement relating to the exchange
of tax information within the meaning of
section 6103(k)(4) pursuant to which the
United States agrees to provide, as well as
receive, information and under which the
competent authority is the Secretary of the
Treasury or the Secretary’s delegate:
Jurisdiction Rev. Proc. First Identifying Jurisdiction
Antigua & Barbuda2012-24
Argentina2018-36
Aruba2012-24
Australia2012-24
Austria2012-24
Azerbaijan2012-24
Bangladesh2012-24
Barbados2012-24
Belgium2012-24
Bermuda2012-24
Brazil2014-64
British Virgin Islands2012-24
Bulgaria2012-24
Canada2012-24
Cayman Islands2014-64
Chile 2021-32
China2012-24
Colombia2014-64
Costa Rica2012-24
Croatia2014-64
Curaçao2014-64
Cyprus2012-24
Czech Republic2012-24
Denmark2012-24
Dominica2012-24
Dominican Republic2012-24
Ecuador2023-36
Egypt2012-24
Estonia2012-24
Faroe Islands2017-46
Finland2012-24
France2012-24
Georgia2019-23

Bulletin No. 2023–51 1487 December 18, 2023
Jurisdiction Rev. Proc. First Identifying Jurisdiction
Germany2012-24
Gibraltar2012-24
Greece2012-24
Greenland2017-46
Grenada2012-24
Guernsey2012-24
Guyana2012-24
Honduras2012-24
Hong Kong2014-64
Hungary2012-24
Iceland2012-24
India2012-24
Indonesia2012-24
Ireland2012-24
Isle of Man2012-24
Israel2012-24
Italy2012-24
Jamaica2012-24
Japan2012-24
Jersey2012-24
Kazakhstan2012-24
Korea, Republic of2012-24
Latvia2012-24
Liechtenstein2012-24
Lithuania2012-24
Luxembourg2012-24
Malta2012-24
Marshall Islands2012-24
Mauritius2014-64
Mexico2012-64
Moldova2018-36
Monaco2012-24
Morocco2012-24
Netherlands2012-24
Netherlands special municipalities: Bonaire, Sint
Eustatius, and Saba
2012-24
New Zealand2012-24
Norway2012-24
Pakistan2012-24
Panama2012-24
Peru2012-24
Philippines2012-24
Poland2012-24
Portugal2012-24

December 18, 2023 1488 Bulletin No. 2023–51
Jurisdiction Rev. Proc. First Identifying Jurisdiction
Romania2012-24
Russian Federation2012-24
Saint Lucia2016-56
Singapore2020-15
Sint Maarten 2014-64
Slovak Republic2012-24
Slovenia2012-24
South Africa2012-24
Spain2012-24
Sri Lanka2012-24
Sweden2012-24
Switzerland2012-24
Thailand2012-24
Trinidad and Tobago2012-24
Tunisia2012-24
Turkey2012-24
Ukraine2012-24
United Kingdom2012-24
Venezuela2012-24
SECTION 4. JURISDICTIONS
WITH WHICH THE TREASURY
DEPARTMENT AND THE IRS HAVE
DETERMINED THAT AUTOMATIC
EXCHANGE OF DEPOSIT
INTEREST INFORMATION IS
APPROPRIATE
The following list identifies the
jurisdictions with which the automatic
exchange of the information collected
under §§ 1.6049-4(b)(5) and 1.6049-8
has been determined by the Treasury
Department and the IRS to be appropriate:
JurisdictionRev. Proc. First Memorializing Determination on
Automatic Exchange with Jurisdiction
Argentina2023-36
Australia2014-64
Azerbaijan2016-18
Belgium2017-31
Brazil2015-50
Canada2012-24
Colombia2017-31
Croatia2017-46
Curaçao2019-23
Cyprus 2019-23
Czech Republic2015-50
Denmark 2014-64
Dominican Republic2021-32
Estonia2015-50
Finland2014-64
France2014-64
Germany 2014-64

Bulletin No. 2023–51 1489 December 18, 2023
JurisdictionRev. Proc. First Memorializing Determination on
Automatic Exchange with Jurisdiction
Gibraltar2015-50
Greece2018-36
Guernsey 2014-64
Hungary2015-50
Iceland2015-50
India2015-50
Ireland2014-64
Isle of Man2014-64
Israel2016-56
Italy2014-64
Jamaica2016-18
Jersey 2014-64
Kazakhstan2023-36
Korea, Republic of2016-56
Latvia2015-50
Liechtenstein2015-50
Lithuania2015-50
Luxembourg2015-50
Malta2014-64
Mauritius2014-64
Mexico2014-64
Netherlands2014-64
New Zealand2015-50
Norway2014-64
Panama2017-46
Poland2015-50
Portugal2017-31
Saint Lucia2016-56
Singapore2021-32
Slovak Republic2016-18
Slovenia2015-50
South Africa2015-50
Spain2014-64
Sweden2015-50
Turkey2022-35
United Kingdom2014-64
SECTION 5. EFFECT ON OTHER
DOCUMENTS
Rev. Proc. 2022-35 is superseded.
SECTION 6. EFFECTIVE DATES
For purposes of the reporting
requirement of § 1.6049-4(b)(5), the
list of jurisdictions in Section 3 of
this revenue procedure is effective for
interest paid on or after January 1 of the
calendar year following the issuance

December 18, 2023 1490 Bulletin No. 2023–51
of the revenue procedure (as cited in
Section 3) first identifying the jurisdic-
tion as having in effect an agreement
with the United States as described in
§ 1.6049-8(a).
The list of jurisdictions in Section 4 of
this revenue procedure is effective from
the date of issuance of this revenue proce-
dure with respect to information reported
to the IRS pursuant to §§ 1.6049-4(b)(5)
and 1.6049-8(a) for any tax year for which
the jurisdiction was included in the list in
Section 3. The revenue procedure cita-
tions in the Section 4 list are included for
historical reference.
SECTION 7. DRAFTING
INFORMATION
The principal author of this reve-
nue procedure is Michelle R. Phillips of
the Office of Associate Chief Counsel
(International). For further information
regarding this revenue procedure, contact
Ms. Phillips at (202) 317-4382 (not a toll-
free number).

Bulletin No. 2023–51 1491 December 18, 2023
Rev. Proc. 2023-37
TABLE OF CONTENTS
PART I. OVERVIEW
SECTION 1. PURPOSE .............................................................................1492
SECTION 2. BACKGROUND ........................................................................1493
SECTION 3. ORGANIZATION OF REVENUE PROCEDURE; SIGNIFICANT CHANGES ......................1494
SECTION 4. DEFINITIONS .........................................................................1496
PART II. REMEDIAL AMENDMENT CYCLES AND REMEDIAL AMENDMENT PERIODS
SECTION 5. REMEDIAL AMENDMENT CYCLE SYSTEM ...............................................1502
SECTION 6. REMEDIAL AMENDMENT PERIODS .....................................................1502
SECTION 7. PLAN AMENDMENT DEADLINES .......................................................1505
SECTION 8. SCHEDULES FOR REMEDIAL AMENDMENT CYCLES ......................................1506
PART III. PROCEDURES FOR A PROVIDER APPLYING FOR AN OPINION LETTER
SECTION 9. PROVISIONS REQUIRED IN PRE-APPROVED PLANS .......................................1506
SECTION 10. OPINION LETTERS - SCOPE ............................................................1515
SECTION 11. ELIGIBILITY FOR THE CYCLE SYSTEM .................................................1518
SECTION 12. EMPLOYER RELIANCE ON OPINION LETTER ............................................1519
SECTION 13. PLAN AMENDMENTS .................................................................1523
SECTION 14. OPINION LETTER APPLICATIONS - INSTRUCTIONS TO PROVIDERS AND OTHER
RULES FOR APPLICATIONS AND LETTERS ..............................................1526
SECTION 15. ADDITIONAL REQUIREMENTS FOR MASS SUBMITTERS .................................1530
SECTION 16. FILINGS MADE AFTER THE SUBMISSION PERIOD .......................................1533
SECTION 17. SCOPE OF REVIEW; TIMING OF ISSUANCE OF OPINION LETTERS .........................1534
SECTION 18. WITHDRAWAL OF APPLICATIONS ......................................................1534
SECTION 19. NONTRANSFERABILITY OF OPINION LETTER ...........................................1535
SECTION 20. NOTIFICATION OF ADOPTING EMPLOYER REGARDING FAILURE OF THE FORM OF
THE PLAN TO SATISFY QUALIFICATION REQUIREMENTS OR SECTION 403(b)
REQUIREMENTS .....................................................................1535
SECTION 21. DISCONTINUED PLANS ...............................................................1535
SECTION 22. REVOCATION OF OPINION LETTER BY THE IRS .........................................1536
SECTION 23. RECORD KEEPING REQUIREMENTS ....................................................1536
SECTION 24. WHERE TO FILE ......................................................................1537
PART IV. PROCEDURES FOR AN ADOPTING EMPLOYER APPLYING FOR A DETERMINATION LETTER
SECTION 25. ADOPTING EMPLOYER APPLYING FOR A DETERMINATION LETTER ......................1537
PART V. MISCELLANEOUS
SECTION 26. EFFECT ON OTHER DOCUMENTS ......................................................1540
SECTION 27. EFFECTIVE DATE .....................................................................1541
SECTION 28. PUBLIC COMMENTS ..................................................................1541
SECTION 29. PAPERWORK REDUCTION ACT ........................................................1542

December 18, 2023 1492 Bulletin No. 2023–51
PART I. OVERVIEW
SECTION 1. PURPOSE
.01 In general. This revenue procedure sets forth the rules regarding Qualified Pre-approved Plans
and Section 403(b) Pre-approved Plans, and combines, conforms, clarifies, and updates rules for
Qualified Pre-approved Plans and Section 403(b) Pre-approved Plans previously set forth in prior
revenue procedures, as described in section 1.01(1) through (3).
1
Combining these prior revenue
procedures allows for the rules for the different types of Pre-approved Plans to be more easily
conformed to each other, to the extent practicable. These rules for Pre-approved Plans fall into
three broad categories:
(1) Remedial Amendment Periods, the Remedial Amendment Cycle system, and plan amendment
deadlines. This revenue procedure sets forth the rules regarding Remedial Amendment Periods,
the Remedial Amendment Cycle system, and plan amendment deadlines for Qualified Pre-
approved Plans and for Section 403(b) Pre-approved Plans, which were previously set forth in
Rev. Proc. 2016-37, 2016-29 IRB 136, as modified by Rev. Proc. 2017-41, 2017-29 IRB 92,
and Rev. Proc. 2020-40, 2020-38 IRB 575 (with respect to Qualified Pre-Approved Plans), and
in Rev. Proc. 2019-39, 2019-42 IRB 945, as modified by Notice 2020-35, 2020-25 IRB 948,
Rev. Proc. 2020-40, and Rev. Proc. 2021-37, 2021-38 IRB 385 (with respect to Section 403(b) Pre-
approved Plans). The rules regarding Remedial Amendment Periods, the Remedial Amendment
Cycle system, and plan amendment deadlines are effective on November 21, 2023.
(2) Provider application for an Opinion Letter. This revenue procedure also sets forth the
procedures for a Provider to apply for an Opinion Letter confirming that the form of the Provider’s
plan satisfies the Qualification Requirements or Section 403(b) Requirements (procedures that
were previously set forth in Rev. Proc. 2017-41, as modified by Rev. Proc. 2018-21, 2018-41
IRB 467 (with respect to Qualified Pre-Approved Plans), and in Rev. Proc. 2021-37 (with respect
to Section 403(b) Pre-approved Plans)). The rules regarding the application procedures for an
Opinion Letter are effective with respect to:
(a) A Cycle 4 (or later) defined contribution Qualified Pre-approved Plan (Cycle 4 for defined
contribution Qualified Pre-approved Plans began on February 1, 2023 (see section 1.02 for the
start of the Submission Period for Cycle 4));
(b) A Cycle 4 (or later) defined benefit Qualified Pre-approved Plan (Cycle 4 for defined benefit
Qualified Pre-approved Plans begins on April 1, 2025); and
(c) A Cycle 3 (or later) Section 403(b) Pre-approved Plan (the Cycle 2 Submission Period for
Section 403(b) Pre-approved Plans ended on May 1, 2023, and Provider applications for Opinion
Letters are currently being reviewed for these Pre-approved Plans).
(3) Adopting Employer application for a determination letter. This revenue procedure also sets
forth the procedures for an Adopting Employer of a Qualified Pre-approved Plan or a Section
403(b) Pre-approved Plan to apply for a determination letter regarding the Adopting Employer’s
plan (procedures that were previously set forth in Rev. Proc. 2016-37 and Rev. Proc. 2017-41
(for an Adopting Employer of a Qualified Pre-approved Plan), and in Rev. Proc. 2021-37 (for an
Adopting Employer of a Section 403(b) Pre-approved Plan)). The rules regarding the application
procedures for a determination letter apply to:
1
All references to “section” in this revenue procedure are to sections of this revenue procedure unless otherwise provided (such as with defined terms like Section 403(b) Pre-approved Plans
and Section 403(b) Requirements). All references using “§” in this revenue procedure are to sections of the Internal Revenue Code or to Treasury regulations.

Bulletin No. 2023–51 1493 December 18, 2023
(a) An application for a determination letter submitted by an Adopting Employer with respect to a
Cycle 4 (or later) defined contribution Qualified Pre-approved Plan;
(b) An application for a determination letter submitted by an Adopting Employer with respect to a
Cycle 4 (or later) defined benefit Qualified Pre-approved Plan; and
(c) An application for a determination letter submitted by an Adopting Employer with respect to a
Cycle 2 (or later) Section 403(b) Pre-approved Plan.
2
.02 Submission Period for Cycle 4 defined contribution Qualified Pre-approved Plans. Pursuant to
this revenue procedure, the Submission Period for a Provider of a defined contribution Qualified
Pre-approved Plan to submit an application for a Cycle 4 Opinion Letter begins on February 1,
2024, and ends on January 31, 2025. A Provider may apply for a Cycle 4 Opinion Letter at other
times. See section 16 regarding filings made after the Submission Period.
SECTION 2. BACKGROUND
.01 Rev. Proc. 2016-37. Rev. Proc. 2016-37 provides that every pre-approved plan has a recurring
six-year remedial amendment cycle and that pre-approved plan providers may apply for new
opinion letters during a remedial amendment cycle. Rev. Proc. 2016-37 also sets forth an extension
of the remedial amendment period and adoption deadline for plan amendments for qualified pre-
approved plans.
3
.02 Rev. Proc. 2017-41. Rev. Proc. 2017-41 sets forth the procedures for issuing opinion letters
regarding the qualification in form of qualified pre-approved plans.
4
.03 Rev. Proc. 2019-39. Rev. Proc. 2019-39, as modified by Notice 2020-35, sets forth a system
of recurring remedial amendment periods for correcting form defects in § 403(b) pre-approved
plans first occurring after June 30, 2020. Rev. Proc. 2019-39 also establishes a system of § 403(b)
pre-approved plan cycles during which a provider may submit a § 403(b) pre-approved plan for
review and approval by the Internal Revenue Service (IRS). Rev. Proc. 2019-39 also sets forth
plan amendment deadlines for amendments made to a § 403(b) pre-approved plan.
.04 Rev. Proc. 2021-37. Rev. Proc. 2021-37 sets forth the procedures for issuing opinion letters
regarding the satisfaction in form of § 403(b) pre-approved plans with respect to the requirements
of § 403(b) of the Internal Revenue Code (Code) for remedial amendment cycle 2. Rev. Proc.
2021-37 also sets forth the rules for determining when remedial amendment periods expire for
§ 403(b) pre-approved plans.
.05 Rev. Proc. 2022-40. Rev. Proc. 2022-40, 2022-47 IRB 487, sets forth the rules and procedures
for an employer to submit a determination letter application for an individually designed qualified
or § 403(b) plan for an initial plan determination, for a determination upon plan termination, and
in certain other circumstances identified by the IRS in guidance published in the Internal Revenue
Bulletin (IRB). Rev. Proc. 2022-40 also sets forth the remedial amendment period rules and plan
amendment deadlines for individually designed qualified or § 403(b) plans.
2
The rules regarding an Adopting Employer’s application for a determination letter apply for Cycle 2 Section 403(b) Pre-approved Plans because, although Cycle 2 has begun, Cycle 2
Opinion Letters have not been issued and the Employer Adoption Window for Cycle 2 (during which an application for a determination letter would generally be submitted) has not begun.
3
The rules of Rev. Proc. 2016-37 still apply for Cycle 3 Qualified Pre-approved Plans. However, Cycle 4 Qualified Pre-approved Plans (whether defined contribution or defined benefit) will
be governed by this revenue procedure and not Rev. Proc. 2016-37.
4
The rules of Rev. Proc. 2017-41 still apply for Cycle 3 Qualified Pre-approved Plans. However, Cycle 4 Qualified Pre-approved Plans (whether defined contribution or defined benefit) will
be governed by this revenue procedure and not Rev. Proc. 2017-41.

December 18, 2023 1494 Bulletin No. 2023–51
.06 Rev. Proc. 2023-4. Rev. Proc. 2023-4, 2023-1 IRB 162, (as updated annually) sets forth
the general procedures on the issuance of Employee Plans determination letters, including a
determination letter for an adopting employer’s pre-approved plan.
SECTION 3. ORGANIZATION OF REVENUE PROCEDURE; SIGNIFICANT CHANGES
.01 Organization of this revenue procedure.
(1) Sections 1 through 4 set forth the purpose, background, organization, significant changes, and
definitions for this revenue procedure.
(2) Sections 5 through 8 set forth the rules regarding Remedial Amendment Periods, the Remedial
Amendment Cycle system, and plan amendment deadlines for Qualified Pre-approved Plans and
for Section 403(b) Pre-approved Plans.
(3) Sections 9 through 24 set forth the procedures for a Provider to apply for an Opinion Letter
confirming that the form of the Provider’s plan satisfies the Qualification Requirements or Section
403(b) Requirements.
(4) Section 25 sets forth the procedures for an Adopting Employer of a Qualified Pre-approved
Plan or a Section 403(b) Pre-approved Plan to apply for a determination letter regarding the
Adopting Employer’s plan.
(5) Sections 26 through 29 set forth miscellaneous provisions, including provisions regarding the
effect on other documents, the effective date, and public comments.
.02 Examples of significant changes from prior revenue procedures. In consolidating the prior
revenue procedures (which set forth rules for qualified pre-approved plans and § 403(b) pre-
approved plans) into this revenue procedure, numerous changes were made to conform, clarify,
and update the rules. The following are some examples of those changes.
(1) For all Pre-approved Plans.
(a) The Remedial Amendment Period for Disqualifying Provisions or Form Defects is clarified
to expire at the same time as the deadline for the adoption of Interim Amendments, as set forth in
section 7. See section 6.03(1).
(b) The end of the Remedial Amendment Period for Discretionary Amendments made by an
Adopting Employer (not by a Provider) is changed. See section 6.03(2).
(c) The Interim Amendment rules are updated to provide that, if an Adopting Employer does not
correct a failure to timely adopt an Interim Amendment within two years after the time period set
forth in section 7, then the Adopting Employer’s plan will be treated as an individually designed
plan at the end of that two-year period. See section 6.04.
(d) The Interim Amendment deadline is changed to match the individually designed plan Remedial
Amendment Period deadline. See section 7.01(1)(a) and (2)(a).
(e) The plan amendment deadline for a Governmental Plan is changed to provide additional time
beyond the deadline for a plan that is not a Governmental Plan only to the extent any action is
required to be taken by the Adopting Employer in order to adopt the amendment. See section
7.01(2).

Bulletin No. 2023–51 1495 December 18, 2023
(f) The eligibility of an employer to adopt a Pre-approved Plan for a Cycle is changed to require that,
for a plan that was not in existence in the immediately preceding Cycle, the plan must have been
submitted for an Opinion Letter for the Cycle before the employer adopts it. See section 11.01(1).
(g) For a starter 401(k) deferral-only plan described in § 401(k)(16) or a safe harbor deferral-only
plan described in § 403(b)(16),
5
an Adopting Employer’s reliance is updated to include those
sections. See section 12.01(6) and 12.02(6).
(h) The circumstances under which a Pre-approved Plan will be treated as an individually designed
plan, and the consequences of such treatment, are updated and clarified. See section 13.05.
(i) The rules for issuing an Opinion Letter are clarified to provide that an Opinion Letter will not
be issued for amendments made between Submission Periods. Instead, a Provider must submit a
restated plan that incorporates the amendments during the next Submission Period. See section
14.15.
(j) The scope of review for an Opinion Letter is clarified and updated. See section 17.01(1) and
(2).
(k) The application filing address is updated. See section 24.
(l) The rules for an Adopting Employer applying for a determination letter are clarified and
updated. See section 25.
(2) For Qualified Pre-approved Plans.
(a) The number of unaffiliated Providers required to be associated with a Mass Submitter is
changed to better match the rules for a Mass Submitter with respect to a Section 403(b) Pre-
approved Plan. See section 4.01(10).
(b) The number of employer-clients a Provider must have is changed to better match the rules for
a Provider with respect to a Section 403(b) Pre-approved Plan. See section 4.01(15).
(c) The Qualification Requirements are clarified to include § 409 for ESOPs. See section 4.02(3).
(d) The rules relating to a Cycle for a Qualified Pre-approved Plan are changed to match the rules
relating to a Cycle for a Section 403(b) Pre-approved Plan. Accordingly, each Cycle is no longer
a fixed six years, and each Cycle now ends at the end of the Employer Adoption Window (with
the result that the Submission Period may begin after the first day of a Cycle). See section 5.02.
(e) The required provisions for a Qualified Pre-approved Plan that is a pension plan and not a
Governmental Plan are changed to require that the plan must have a normal retirement age that is
not less than age 55. See section 9.02(13).
(f) The effect of an amendment with respect to which a closing agreement under the Audit Closing
Agreement Program or a compliance statement under the Voluntary Correction Program of the
Employee Plans Compliance Resolution System (EPCRS) has been issued is clarified to match
the rules for a Section 403(b) Pre-approved Plan and provide that reliance on the Opinion Letter
will not be lost. See section 13.02(8).
(g) The application procedures for an Opinion Letter are changed to no longer require attachments
required in prior Cycles. See section 14.03, which no longer has the requirement.
5
Section 121 of Division T of the Consolidated Appropriations Act, 2023, Pub. L. 117-328, 136 Stat. 4459 (2022), known as the SECURE 2.0 Act of 2022, added §§ 401(k)(16) and 403(b)
(16) to the Code, effective for plan years beginning after December 31, 2023.

December 18, 2023 1496 Bulletin No. 2023–51
(h) The consequences of a Provider failure to disclose a material fact are changed to match the
rules for a Provider failure to disclose a material fact with respect to a Section 403(b) Pre-approved
Plan. See section 14.11.
(i) The consequences of a Mass Submitter’s failure to identify a modification are changed to match
the rules for a Mass Submitter’s failure to identify a modification with respect to a Section 403(b)
Pre-approved Plan. See section 15.03(2)(c).
(j) The requirements for a Provider of a discontinued plan are changed to match the rules for a
discontinued plan with respect to a Section 403(b) Pre-approved Plan. See section 21.02.
(3) For Section 403(b) Pre-approved Plans.
(a) The integral amendment portion of the definition of Form Defect is changed to better match the
Qualified Pre-approved Plan rules for a Disqualified Provision. See section 4.03(2).
(b) The requirements for a Standardized Section 403(b) Pre-approved Plan that provides only
for elective deferrals are updated to add requirements regarding hardship distributions and § 415
language. See section 9.07(1) and (2).
(c) The requirements for a Standardized Section 403(b) Pre-approved Plan that provides for
contributions other than elective deferrals are changed so that the requirements of section 9.07(3)
(b) apply only to contributions other than elective deferrals. See section 9.07(3)(b).
(d) The rules for when an Opinion Letter will not be issued with respect to a Section 403(b) Pre-
approved Plan are changed to better match the rules for when an Opinion Letter will not be issued
with respect to a Qualified Pre-approved Plan and to provide that an Opinion Letter will not be
issued for (i) a plan designed to satisfy the provisions of § 105, (ii) a plan that includes § 401(h)
accounts, and (iii) a plan that includes purported fail-safe provisions for § 401(a)(4) or the average
benefit test under § 410(b). See section 10.02(1).
(e) The rules for an Adopting Employer of a Section 403(b) Pre-approved Plan that applies for
a determination letter are updated to better match the Qualified Pre-approved Plan rules for
determination letter applications. See section 25.
SECTION 4. DEFINITIONS
.01 General definitions. For purposes of this revenue procedure, the following definitions apply
to all Pre-approved Plans.
(1) Adopting Employer. The term “Adopting Employer” means an Employer that adopts a Pre-
approved Plan offered by a Provider.
(2) Adoption Agreement Plan. The term “Adoption Agreement Plan” means a plan that consists of
a basic plan document and an adoption agreement. The basic plan document includes all the non-
elective provisions applicable to all Adopting Employers, and the adoption agreement includes
the options that may be selected by each Adopting Employer. No options (including blanks to be
completed) may be provided in the basic plan document portion of the Adoption Agreement Plan
(except as set forth in section 15.03 regarding Flexible Plans).
(3) Cycle.
The term “Cycle” means a Remedial Amendment Cycle, as defined in section 4.01(17).

Bulletin No. 2023–51 1497 December 18, 2023
(4) Discretionary Amendment. The term “Discretionary Amendment” means an amendment that
is not an Interim Amendment.
(5) Employer. The term “Employer” means an employer that sponsors a Qualified Pre-approved
Plan for its employees or an eligible employer, as described in § 403(b)(1)(A), that sponsors a
Section 403(b) Pre-approved Plan for its employees.
(6) Employer Adoption Window. The term “Employer Adoption Window” means the period during
which an Adopting Employer must adopt a newly approved Pre-approved Plan for a Cycle, and is
also generally the period during which an Adopting Employer of a newly approved Pre-approved
Plan may submit an application for a determination letter (if otherwise permitted). See section 5.02
regarding the Employer Adoption Window and section 25 regarding determination letters.
(7) Flexible Plan. The term “Flexible Plan” means a plan submitted by a Mass Submitter that
includes optional provisions (as described in section 15.03(1)(b)).
(8) Governmental Plan. The term “Governmental Plan” means a governmental plan within the
meaning of § 414(d).
(9) Interim Amendment. The term “Interim Amendment” means an amendment to correct a
Disqualifying Provision or a Form Defect that results in the failure of a Pre-approved Plan to
satisfy a Qualification Requirement or Section 403(b) Requirement, as applicable, by reason of
a change in that requirement, or an amendment that is integral to that Disqualifying Provision or
Form Defect. See section 6.04.
(10) Mass Submitter. The term “Mass Submitter” means any person that (a) has an established
place of business in the United States where it is accessible during every business day, and
(b) submits Opinion Letter applications on behalf of 15 unaffiliated Providers, each of which
is offering, on a word-for-word identical basis, the same plan. A Flexible Plan that is offered
by a Provider is considered a plan that is word-for-word identical. For purposes of determining
whether 15 unaffiliated Providers offer, on a word-for-word identical basis, the same Pre-approved
Plan, a Mass Submitter that is also a Provider is treated as an unaffiliated Provider. For purposes
of this definition, affiliation is determined under § 414(b) and (c). Additionally, any law firm,
accounting firm, consulting firm, or similar organization is considered to be affiliated with its
partners, members, associates, or similar affiliated persons. A Mass Submitter is treated as a Mass
Submitter with respect to all of its plans, provided the 15-unaffiliated-Provider requirement is met
with respect to at least one plan. See section 15 for rules relating to a Mass Submitter’s plans.
(11) Minor Modification. The term “Minor Modification” means a minor change to an otherwise
word-for-word identical Pre-approved Plan of the Mass Submitter that the IRS determines does
not require an in-depth IRS technical review. For example, a change from five-year 100% vesting
to three-year 100% vesting is a minor modification for a defined benefit plan. On the other hand,
a change in the method of accrual of benefits in a defined benefit plan would not be considered a
Minor Modification.
(12) Nonstandardized Plan. The term “Nonstandardized Plan” means a Pre-approved Plan that is
not a Standardized Plan.
(13) Opinion Letter. The term “Opinion Letter” means a written statement issued by the IRS to
a Provider or Mass Submitter that the form of a Qualified Pre-approved Plan or a Section 403(b)
Pre-approved Plan satisfies the Qualification Requirements or the Section 403(b) Requirements,
respectively, that are being reviewed by the IRS for the Cycle for which the Opinion Letter is
being issued.
(14) Pre-approved Plan. The term “Pre-approved Plan” means a plan (including a plan that is
word-for-word identical to, or a Minor Modification of, a Mass Submitter’s plan) that has received
an Opinion Letter under this revenue procedure (or a predecessor of this revenue procedure) and

December 18, 2023 1498 Bulletin No. 2023–51
that is made available by a Provider for adoption by Employers. A Pre-approved Plan includes
a plan covering self-employed individuals. A Pre-approved Plan may be either a Qualified Pre-
approved Plan or a Section 403(b) Pre-approved Plan. A Qualified Pre-approved Plan or a Section
403(b) Pre-approved Plan may be either a Standardized Plan or a Nonstandardized Plan. A
Qualified Pre-approved Plan or a Section 403(b) Pre-approved Plan may be structured as either an
Adoption Agreement Plan or a Single Document Plan.
(15) Provider.
(a) The term “Provider” means any person (including, if applicable, a Mass Submitter) that:
(i) Has an established place of business in the United States where it is accessible during every
business day, and
(ii) Represents to the IRS in its application for an Opinion Letter that it has at least 15 Employer-
clients (except as set forth in section 4.01(15)(a)(ii)(A) regarding a Retirement Income Account),
each of which is reasonably expected to adopt one of the Provider’s Pre-approved Plans.
(A) A person that is otherwise eligible to be a Provider generally may apply for an Opinion Letter
for a Section 403(b) Pre-approved Plan that is intended to be a Retirement Income Account without
satisfying the 15-Employer-client requirement with respect to that plan. However, if that person
also applies for an Opinion Letter with respect to a Section 403(b) Pre-approved Plan that is not a
Retirement Income Account, the person would need to meet the 15-Employer-client requirement
for the plan that is not a Retirement Income Account.
(B) The IRS reserves the right to request from the Provider at any time a list of the Employers that
have adopted or are expected to adopt the Provider’s plans, including the Employers’ business
addresses and employer identification numbers.
(b) Notwithstanding the preceding provisions of this section 4.01(15), any person that has an
established place of business in the United States where it is accessible during every business
day may offer a plan that is word-for-word identical to a Mass Submitter’s plan as an identical
adopter or a plan that includes Minor Modifications to a Mass Submitter’s plan as a minor modifier
adopter regardless of the number of Employers that are expected to adopt the plan. See section
15 for rules relating to a Mass Submitter’s plans, including procedures for identical adopters and
minor modifier adopters of a Mass Submitter’s plans.
(c) By submitting an application for an Opinion Letter for a Pre-approved Plan under this revenue
procedure (or by having an application filed on its behalf by a Mass Submitter as an identical
adopter or a minor modifier adopter), a person represents to the IRS that it is a Provider, and that it
agrees to comply with any requirements imposed on Providers by this revenue procedure. Failure
to comply with these requirements may result in the loss of eligibility to offer Pre-approved Plans
and the revocation of Opinion Letters that have been issued to the Provider.
(16) Related Employers. For a Pre-approved Plan other than a Section 403(b) Pre-approved Plan
that is a Governmental Plan, the term “Related Employer” means an employer that is aggregated
with the Adopting Employer under § 414(b), (c), (m), and (o) and the regulations thereunder. For
a Section 403(b) Pre-approved Plan that is a Governmental Plan, the term “Related Employer”
means an employer that is aggregated with the Adopting Employer in a manner consistent with
Notice 89-23, 1989-1 CB 654.
(17) Remedial Amendment Cycle. The term “Remedial Amendment Cycle” means the time period
designated by the IRS during which (1) a Provider submits a proposed Pre-approved Plan for
review and approval by the IRS, (2) the plan, once approved, is adopted by Employers, and (3) an
Adopting Employer of a newly approved Pre-approved Plan generally may submit an application
for a determination letter (if otherwise permitted). See section 5.

Bulletin No. 2023–51 1499 December 18, 2023
(18) Remedial Amendment Period. The term “Remedial Amendment Period” means the period
during which an employer maintaining a plan may correct Disqualifying Provisions or Form
Defects, as applicable, in its plan retroactive to the beginning of that period. As part of the correction
of a Disqualifying Provision or a Form Defect within the applicable Remedial Amendment Period,
an Adopting Employer is considered to have satisfied the Qualification Requirements or Section
403(b) Requirements, as applicable, if all provisions of the plan that are necessary to satisfy those
requirements have been adopted and made effective in form and operation from the beginning of
the Remedial Amendment Period. See section 6.
(19) Single Document Plan. The term “Single Document Plan” means a plan offered by a Provider
that consists of a single plan document without an adoption agreement. A Single Document Plan
may include alternate paragraphs and options that may be selected by an Adopting Employer
(including blanks to be completed by the Adopting Employer in accordance with specified
parameters).
(20) Standardized Plan. The term “Standardized Plan” means a Pre-approved Plan that satisfies
the requirements set forth in section 9.03 or 9.07, as applicable. A Qualified Pre-approved Plan
that includes an ESOP or that is a Statutory Hybrid Plan may not be a Standardized Plan.
(21) Submission Period. The term “Submission Period” means the period during which a Provider
(including a Mass Submitter) may apply for an Opinion Letter for a particular Cycle. See section
5.02; also see section 16 regarding filings made after the Submission Period.
.02 Definitions applicable solely to Qualified Pre-approved Plans. For purposes of this revenue
procedure, the following definitions apply to Qualified Pre-approved Plans and do not apply to
Section 403(b) Pre-approved Plans.
(1) Disqualifying Provision.
(a) In general. For a Qualified Pre-approved Plan, the term “Disqualifying Provision” means:
(i) A provision of a new plan, the absence of a provision from a new plan, or an amendment to an
existing plan that causes the plan to fail to satisfy the requirements of the Code applicable to the
qualification of the plan as of the date the plan or amendment is first made effective;
(ii) A plan provision that, pursuant to § 1.401(b)-1(b)(3), has been designated by the Commissioner,
in guidance published in the IRB, as a disqualifying provision by reason of a change in those
requirements; or
(iii) The absence from a plan of a provision required by (or, if applicable, integral to) a change in
the qualification requirements of the Code.
(b) Designation of Disqualifying Provisions. Pursuant to § 1.401(b)-1(b)(3), the IRS designates a
plan provision as a Disqualifying Provision if it:
(i) Results in the failure of the plan to satisfy the qualification requirements of the Code by reason
of a change in those requirements that is effective after December 31, 2001; or
(ii) Is integral to a Disqualifying Provision described in section 4.02(1)(b)(i).
(2) Qualified Pre-approved Plan. The term “Qualified Pre-approved Plan” means a Pre-approved
Plan that is intended to meet the Qualification Requirements.

December 18, 2023 1500 Bulletin No. 2023–51
(3) Qualification Requirements. The term “Qualification Requirements” means the requirements
of §§ 401(a), 403(a), 409, and 4975(e)(7), including requirements provided by statute, or in
regulations or other guidance published in the IRB.
6
(4) Trust or Custodial Account Document. The term “Trust or Custodial Account Document”
means the separate portion of a Qualified Pre-approved Plan that includes the trust agreement
or custodial account agreement and includes provisions covering such matters as the powers
and duties of trustees, investment authority, and the kinds of investments that may be made.
All provisions of the Trust or Custodial Account Document must be applicable to all Adopting
Employers of that trust or custodial account. The trust agreement or custodial account agreement
must be in a document separate from the plan document that is submitted for an Opinion Letter.
(5) Definitions related to ESOPs.
(a) ESOP. The term “ESOP” means an employee stock ownership plan within the meaning of
§ 4975(e)(7).
(b) Exempt Loan. The term “Exempt Loan” means a loan described in § 4975(d)(3) that satisfies
the requirements for exemption from the excise tax imposed under § 4975(a) and (b) described in
§ 54.4975-7(b).
(c) Readily Tradable Employer Securities. The term “Readily Tradable Employer Securities”
means publicly traded securities as defined in § 1.401(a)(35)-1(f)(5).
(6) Definitions related to Hybrid Plans.
(a) Cash Balance Formula. The term “Cash Balance Formula” means a statutory hybrid benefit
formula, as defined in § 1.411(a)(13)-1(d)(4), that is used to determine all or any part of a
participant’s accumulated benefit, and under which the accumulated benefit provided under the
formula is expressed as the current balance of a hypothetical account maintained for the participant.
The hypothetical account balance generally consists of Principal Credits and Interest Credits.
(b) Cash Balance Plan. The term “Cash Balance Plan” means a defined benefit plan that includes
a Cash Balance Formula.
(c) Conversion Amendment. The term “Conversion Amendment” means an amendment defined
in § 1.411(b)(5)-1(c)(4). Under this regulation, a conversion amendment is an amendment (i) that
reduces or eliminates the benefits that, but for the amendment, a participant would have earned
after the effective date of the amendment under a benefit formula that is not a statutory hybrid
benefit formula within the meaning of § 1.411(a)(13)-1(d)(4), and (ii) with respect to which, after
the effective date of the amendment, all or a portion of the participant’s benefit accruals under the
plan are determined under a statutory hybrid benefit formula.
(d) Interest Credit. The term “Interest Credit” means an interest credit as defined in § 1.411(b)
(5)-1(d)(1)(ii)(A). Under this regulation, an interest credit is an adjustment to a participant’s
hypothetical account balance for a period that is not conditioned on service and that is determined
by applying a rate of interest or rate of return to the participant’s hypothetical account balance as
of the beginning of the period.
(e) Offset. The term “Offset” means the reduction of benefits under an Employer’s defined benefit
plan by an amount attributable to the benefits payable under another plan of the Employer.
6
Under this definition, a change in Qualification Requirements includes a change provided by statute, or in regulations or other guidance published in the IRB, that affects a requirement of
§ 401(a), 403(a), 409, or 4975(e)(7), without regard to whether the change results in a Disqualifying Provision or merely permits the adoption of a Discretionary Amendment.

Bulletin No. 2023–51 1501 December 18, 2023
(f) Principal Credit. The term “Principal Credit” means a principal credit as defined in § 1.411(b)
(5)-1(d)(1)(ii)(D), which includes any increase in a participant’s hypothetical account balance that
is not an Interest Credit.
(g) Statutory Hybrid Plan. The term “Statutory Hybrid Plan” means a defined benefit plan that
includes a statutory hybrid benefit formula as defined in § 1.411(a)(13)-1(d)(4).
(h) Variable Annuity Plan. The term “Variable Annuity Plan” means any defined benefit plan that
includes a variable annuity benefit formula as defined in § 1.411(a)(13)-1(d)(6).
.03 Definitions applicable solely to Section 403(b) Pre-approved Plans. For purposes of this
revenue procedure, the following definitions apply to Section 403(b) Pre-approved Plans, and do
not apply to Qualified Pre-approved Plans:
(1) Church. The term “Church” means a church within the meaning of § 3121(w)(3)(A).
(2) Form Defect. The term “Form Defect” means:
(a) A provision of a new plan, the absence of a provision from a new plan, or an amendment to
an existing plan that causes the form of the § 403(b) plan to fail to satisfy the Section 403(b)
Requirements applicable as of the date the plan or amendment is first made effective;
(b) A plan provision that:
(i) Results in the failure of the form of the § 403(b) plan to satisfy the Section 403(b) Requirements
by reason of a change in those requirements; or
(ii) Is integral to a Form Defect described in section 4.03(2)(b)(i); or
(c) The absence from a plan of a provision required by (or, if applicable, integral to) a change in
the Section 403(b) Requirements.
(3) Investment Arrangement. The term “Investment Arrangement” means a funding arrangement
under a Section 403(b) Pre-approved Plan. An Investment Arrangement may be an annuity contract
under § 1.403(b)-2(b)(2), a custodial account under § 403(b)(7), or a Retirement Income Account.
(4) Non-qualified Church-Controlled Organization or Non-QCCO. The term “Non-qualified
Church-Controlled Organization” or “Non-QCCO” means a church-controlled tax-exempt
organization described in § 501(c)(3) that is not a QCCO.
(5) Qualified Church-Controlled Organization or QCCO. The term “Qualified Church-Controlled
Organization” or “QCCO” means a church-controlled tax-exempt organization described in
§ 501(c)(3) that is a qualified church-controlled organization within the meaning of § 3121(w)
(3)(B).
(6) Retirement Income Account. The term “Retirement Income Account” means a defined
contribution program established or maintained by a Church, including an organization described
in § 414(e)(3)(A), to provide benefits under § 403(b) for an employee described in § 403(b)(1)
(including an employee described in § 414(e)(3)(B)) or his or her beneficiaries, as described in
§ 403(b)(9).
(7) Section 403(b) Pre-approved Plan. The term “Section 403(b) Pre-approved Plan” means a Pre-
approved Plan that is intended to meet the Section 403(b) Requirements.

December 18, 2023 1502 Bulletin No. 2023–51
(8) Section 403(b) Requirements. The term “Section 403(b) Requirements” means the requirements
of § 403(b), including requirements provided in the Code, or in regulations or other guidance
published in the IRB.
7
PART II. REMEDIAL AMENDMENT CYCLES AND REMEDIAL AMENDMENT PERIODS
SECTION 5. REMEDIAL AMENDMENT CYCLE SYSTEM
.01 Remedial Amendment Cycles. Under this revenue procedure, every Pre-approved Plan has a
recurring Remedial Amendment Cycle. Providers may apply for new Opinion Letters for each
Cycle. Adopting Employers of Pre-approved Plans, if otherwise eligible under section 25, may
apply for determination letters once each Cycle. Defined contribution Qualified Pre-approved
Plans, defined benefit Qualified Pre-approved Plans, and Section 403(b) Pre-approved Plans
each have different Cycles. While the same Cycle applies with respect to all defined contribution
Qualified Pre-approved Plans, separate Cycles apply with respect to all defined benefit Qualified
Pre-approved Plans and with respect to all Section 403(b) Pre-approved Plans.
.02 Stages of Remedial Amendment Cycle. For each Cycle, a Provider may apply for an Opinion
Letter during the Submission Period, which generally begins at or shortly after the beginning
of each Cycle. When the IRS’s review of the Pre-approved Plans that are submitted during a
Cycle is near completion, the IRS will announce the Employer Adoption Window for that Cycle,
during which an Adopting Employer must adopt a newly approved Pre-approved Plan for that
Cycle in order to continue to have a Pre-approved Plan. The Employer Adoption Window is also
generally the period during which an Adopting Employer of a newly approved Pre-approved
Plan may submit for a determination letter, if applicable, pursuant to section 25.
8
The deadline to
adopt a newly approved Pre-approved Plan is expected to be a uniform date that will apply to all
Adopting Employers. It is expected that the Employer Adoption Window will provide virtually
all Employers approximately two years to adopt a newly approved Pre-approved Plan and file
for a determination letter, if applicable. A Cycle ends at the end of the last day of the Employer
Adoption Window for that Cycle. The next Cycle begins on the following day.
.03 Cycle 4 Submission Period for defined contribution Qualified Pre-approved Plans. Pursuant to
this revenue procedure, the Submission Period for a Provider of a defined contribution Qualified
Pre-approved Plan to apply for a Cycle 4 Opinion Letter begins on February 1, 2024, and ends
on January 31, 2025. A Provider of a defined contribution Qualified Pre-approved Plan may still
apply for a Cycle 4 Opinion Letter after the Submission Period. See section 16 regarding filings
made after the Submission Period.
SECTION 6. REMEDIAL AMENDMENT PERIODS
.01 In general. The provisions of this section 6 set forth the Remedial Amendment Periods for
Disqualifying Provisions and Form Defects for Pre-approved Plans. A Qualified Pre-approved Plan
that does not satisfy a Qualification Requirement or a Section 403(b) Pre-approved Plan that does
not satisfy a Section 403(b) Requirement on any day solely as a result of a Disqualifying Provision
or Form Defect, as applicable, is considered to have satisfied the Qualification Requirement or
7
Under this definition, a change in Section 403(b) Requirements includes a statutory, regulatory, or other guidance change that affects a requirement of § 403(b), without regard to whether
the change results in a Form Defect or merely permits the adoption of a Discretionary Amendment.
8
But see, section 25 for when an Adopting Employer may apply for a determination letter outside of the Employer Adoption Window.

Bulletin No. 2023–51 1503 December 18, 2023
Section 403(b) Requirement on that date if, on or before the last day of the Remedial Amendment
Period with respect to the Disqualifying Provision or Form Defect, all provisions of the plan
that are necessary to satisfy the Qualification Requirement or Section 403(b) Requirement, as
applicable, have been adopted and made effective in form and operation for the whole of the
period. A Pre-approved Plan for which an Adopting Employer does not correct a Disqualifying
Provision or Form Defect within the applicable Remedial Amendment Period is not considered to
satisfy the Qualification Requirements or Section 403(b) Requirements, as applicable.
.02 Beginning dates of the Remedial Amendment Period.
(1) Disqualifying Provisions. Pursuant to § 1.401(b)-1(d)(1), unless another time is specified
by the Commissioner in guidance published in the IRB, the Remedial Amendment Period for a
Disqualifying Provision begins:
(a) In the case of a Disqualifying Provision with respect to a provision of, or absence of a provision
from, a new plan, on the date the plan is put into effect;
(b) In the case of a Disqualifying Provision with respect to an amendment to an existing plan (other
than a Disqualifying Provision that is related to a change in Qualification Requirements, or that is
integral to such a change, as described in section 4.02(1)(b)), on the date the plan amendment is
adopted or put into effect, whichever is earlier;
(c) In the case of a Disqualifying Provision with respect to a provision that fails to satisfy the
Qualification Requirements by reason of a change in those requirements, on the date on which the
change effected by an amendment to the Code or a change in requirements provided in regulations
or other guidance published in the IRB became effective with respect to the plan; or
(d) In the case of a Disqualifying Provision with respect to a provision that is integral to a
Qualification Requirement that has been changed, on the first day on which the plan was operated
in accordance with such provision, as amended.
(2) Form Defects. Unless another time is specified by the Commissioner in guidance published in
the IRB, the Remedial Amendment Period for a Form Defect begins:
(a) In the case of a Form Defect with respect to a provision of, or absence of a provision from, a
new plan, on the date the plan is put into effect;
(b) In the case of a Form Defect with respect to an amendment to an existing plan (other than a
Form Defect that is related to a change in Section 403(b) Requirements, or that is integral to such
a change, as described in section 4.03(2)(b)), on the date the plan amendment is adopted or put
into effect, whichever is earlier;
(c) In the case of a Form Defect with respect to a provision that fails to satisfy the Section 403(b)
Requirements by reason of a change in those requirements, on the date on which the change
effected by an amendment to the Code or a change in requirements provided in regulations or
other guidance published in the IRB became effective with respect to the plan; or
(d) In the case of a Form Defect with respect to a provision that is integral to a Section 403(b)
Requirement that has been changed, on the first day on which the plan was operated in accordance
with such provision, as amended.
.03 Expiration of the Remedial Amendment Period.
(1) In general. Provided an Interim Amendment, if applicable, is made timely, and except as
otherwise provided in section 6.03(2), by statute, or in regulations or other guidance published
in the IRB, the Remedial Amendment Period for a Disqualifying Provision or a Form Defect,
as applicable, expires at the later of (a) the end of the Cycle that includes the date on which the

December 18, 2023 1504 Bulletin No. 2023–51
Remedial Amendment Period would have ended if the plan were an individually designed plan,
9
or (b) the end of the first Cycle in which an application for an Opinion Letter that considers
the Disqualifying Provision or Form Defect may be submitted. This Remedial Amendment
Period applies regardless of whether the Disqualifying Provision or Form Defect relates to a new
plan or is due to an amendment to an existing plan (without regard to whether the amendment
was required to be adopted), provided that the plan or amendment was adopted timely and in
good faith with the intent of complying with the Qualification Requirements or Section 403(b)
Requirements, as applicable. The IRS will make the final determination in all cases as to whether
a new plan or an amendment to an existing plan was adopted with the good faith intention of
complying with the Qualification Requirements or Section 403(b) Requirements, as applicable.
If an Interim Amendment is not made timely, then the Remedial Amendment Period for the
Disqualifying Provision or the Form Defect, as applicable, expires at the time of the Interim
Amendment deadline set forth in section 7.
(2) Discretionary Amendments made by an Adopting Employer. For a Discretionary Amendment
made by an Adopting Employer (not by the Provider), the Remedial Amendment Period for
a Disqualifying Provision or a Form Defect, as applicable, arising from that Discretionary
Amendment expires at the end of the Cycle that includes the date on which the Remedial
Amendment Period would have ended if the plan were an individually designed plan.
.04 Interim Amendment requirement. To promote compliance during a Cycle with a change in
Qualification Requirements or Section 403(b) Requirements that affects provisions of a written
plan document, a Provider (or Adopting Employer, if applicable) of a Pre-approved Plan must
adopt an Interim Amendment with respect to the change within the time period set forth in
section 7, unless the Provider (or Adopting Employer, if applicable) reasonably and in good faith
determines that no amendment is required.
10
The IRS will make the final determination in all
cases as to whether the determination that no Interim Amendment was required is reasonable and
in good faith. If an Interim Amendment is not adopted by the end of the time period set forth in
section 7, the Provider (or Adopting Employer, if applicable) must correct this failure to timely
adopt the Interim Amendment within two years after the end of the time period set forth in section
7; otherwise the Adopting Employer’s plan will be treated as an individually designed plan at the
end of that two-year period. See section 13.05 for a Pre-approved Plan treated as individually
designed.
11
.05 Terminating plan. Notwithstanding any other provision of this section 6, the termination of
a Pre-approved Plan ends the Remedial Amendment Period for each Disqualifying Provision
or Form Defect of the plan and, thus, generally will shorten the Remedial Amendment Period.
Accordingly, any retroactive remedial plan amendments or other required plan amendments
for a terminating plan (that is, plan amendments required to be adopted to reflect Qualification
Requirements or Section 403(b) Requirements that apply as of the date of termination) must be
adopted in connection with the plan termination regardless of whether such requirements are
included on a Cumulative List described in section 17, Operational Compliance List described in
section 14.09, or Required Amendments List described in Rev. Proc. 2022-40.
12
.06 Circumstances in which a Disqualifying Provision or Form Defect may not be corrected
retroactively during a Remedial Amendment Period. If it is not possible to amend a plan
retroactively during a Remedial Amendment Period so that all provisions of the plan that are
necessary to satisfy Qualification Requirements or Section 403(b) Requirements related to the
Disqualifying Provision or Form Defect, as applicable, are made effective in operation for the
9
For the Remedial Amendment Period rules for individually designed qualified and § 403(b) plans, see Rev. Proc. 2022-40.
10
See section 14.09 regarding the Operational Compliance List, which identifies changes to Qualification Requirements or Section 403(b) Requirements that are effective during a calendar
year.
11
During the two-year period, the plan will not cease to be a Pre-approved Plan solely because it has failed to adopt the Interim Amendment. Once a plan is treated as an individually designed
plan, the plan will be subject to the remedial amendment period rules applicable to individually designed plans and therefore will have a failure to satisfy the Qualification Requirements or
Section 403(b) Requirements for failing to have adopted the Interim Amendment (and must use EPCRS to correct that failure in order to adopt a Pre-approved Plan again).
12
The Required Amendments List establishes the end of the Remedial Amendment Period and the plan amendment deadline for changes in qualification requirements and § 403(b) require-
ments set forth on the list for qualified individually designed plans and § 403(b) individually designed plans, respectively. The Required Amendments Lists can be found at https://www.irs.
gov/retirement-plans/required-amendments-list.

Bulletin No. 2023–51 1505 December 18, 2023
whole Remedial Amendment Period, then the Disqualifying Provision or Form Defect may not be
corrected retroactively in order for the form of the plan to satisfy the Qualification Requirements
or Section 403(b) Requirements, as applicable, even if the Adopting Employer adopts a retroactive
plan amendment that, in form, appears to satisfy those requirements. An Adopting Employer
maintaining a Pre-approved Plan that cannot be corrected by an amendment during the applicable
Remedial Amendment Period may be able to correct the Disqualifying Provision or Form Defect
under EPCRS. See Rev. Proc. 2021-30, 2021-31 IRB 172 (or its successor).
SECTION 7. PLAN AMENDMENT DEADLINES
.01 Plan amendment deadline. Except as otherwise provided in section 7.02, the deadline for the
timely adoption of an amendment for a Pre-approved Plan is determined as follows.
(1) Pre-approved Plan that is not a Governmental Plan.
(a) Interim Amendments. For a Pre-approved Plan that is not a Governmental Plan, a Provider
(or the Adopting Employer, if applicable) adopts an Interim Amendment timely if the plan
amendment is adopted by the last day of the second calendar year that begins after the issuance
of the Required Amendments List (described in Rev. Proc. 2022-40) in which the change in
Qualification Requirements or Section 403(b) Requirements appears.
(b) Discretionary Amendments. For a Pre-approved Plan that is not a Governmental Plan, in
the case of a Discretionary Amendment, an Adopting Employer adopts the amendment timely
if the Adopting Employer (or a Provider, if applicable) adopts the plan amendment by the end
of the plan year in which the plan amendment is operationally put into effect. An amendment is
operationally put into effect when the plan is administered in a manner consistent with the intended
plan amendment (rather than existing plan terms). For example, the deadline for adopting a
Discretionary Amendment with respect to a calendar year plan that increases participants’ accrued
benefits and is operationally put into effect during 2023 is December 31, 2023.
(2) Pre-approved plan that is a Governmental Plan.
(a) Interim Amendments. For a Governmental Plan, in the case of an Interim Amendment,
a Provider (or the Adopting Employer, if applicable) adopts the amendment timely if the plan
amendment is adopted by the later of:
(i) The last day of the second calendar year that begins after the issuance of the Required
Amendments List (described in Rev. Proc. 2022-40) in which the change in Qualification
Requirements or Section 403(b) Requirements appears; or
(ii) To the extent any action is required to be taken by the Adopting Employer in order to adopt
the Interim Amendment, 90 days after the close of the third regular legislative session of the
legislative body with the authority to amend the plan that begins on or after the date the plan
amendment becomes effective.
(b) Discretionary Amendments. For a Governmental Plan, in the case of a Discretionary
Amendment, an Adopting Employer (or a Provider, if applicable) adopts the plan amendment
timely if the Adopting Employer adopts the plan amendment by the later of:
(i) The end of the plan year in which the plan amendment is operationally put into effect; or
(ii) To the extent any action is required to be taken by the Adopting Employer in order to adopt the
Discretionary Amendment, 90 days after the close of the second regular legislative session of the

December 18, 2023 1506 Bulletin No. 2023–51
legislative body with authority to amend the plan that begins on or after the date the amendment
becomes effective.
.02 Exceptions to section 7.01 plan amendment deadlines. Section 7.01 applies unless (1) a
statutory provision, or regulations or other guidance published in the IRB, sets forth a deadline
to timely adopt a Discretionary Amendment with respect to a plan year that is different from
the deadlines under section 7.01, or (2) a statutory provision, or regulations or other guidance
published in the IRB, sets forth a deadline to timely adopt a particular type of Interim Amendment
that is different from the deadlines under section 7.01.
SECTION 8. SCHEDULES FOR REMEDIAL AMENDMENT CYCLES
The schedules for Pre-approved Plan Cycles are available at https://www.irs.gov/retirement-
plans/determination-opinion-and-advisory-letters-6-year-cycle-for-pre-approved-plans-plans.
The IRS may revise the schedules to respond to changing circumstances and the needs of
Adopting Employers, as necessary. The IRS will announce any such revisions and the timing of
the Submission Period for each Cycle, which will be reflected in guidance published in the IRB
(either in a revenue procedure, an announcement, or in the applicable Cumulative List (which will
be issued prior to a Submission Period)).
PART III. PROCEDURES FOR A PROVIDER APPLYING FOR AN OPINION LETTER
SECTION 9. PROVISIONS REQUIRED IN PRE-APPROVED PLANS
.01 Provisions required in Pre-approved Plans.
(1) Provisions required in Qualified Pre-approved Plans. Each Qualified Pre-approved Plan
must comply with the requirements set forth in section 9.02. Section 9.03 sets forth additional
provisions required for a Qualified Pre-approved Plan that is a Standardized Plan. Section 9.04
sets forth additional provisions required for a Qualified Pre-approved Plan that includes an ESOP.
Section 9.05 sets forth additional provisions required in a Qualified Pre-approved Plan that
includes a Cash Balance Formula.
(2) Provisions required in Section 403(b) Pre-approved Plans. Each Section 403(b) Pre-approved
Plan must comply with the requirements set forth in section 9.06. Section 9.07 sets forth additional
provisions required for a Section 403(b) Pre-approved Plan that is a Standardized Plan. Section
9.08 sets forth additional provisions for a Section 403(b) Pre-approved Plan that is a Retirement
Income Account.
.02 Provisions required in a Qualified Pre-approved Plan.
(1) Provider amendments. Each Qualified Pre-approved Plan must include a procedure for
amendments by the Provider, so that a Provider may modify the plan to reflect changes provided
by statute, or in regulations or other guidance published in the IRB, and so that any correction
of the plan may be applied to all Adopting Employers. The procedure for amendments by the
Provider also must state that, for purposes of the Pre-approved Plan program, the Provider will no
longer have the authority to amend the plan on behalf of the Adopting Employer as of the date the
plan is treated as an individually designed plan pursuant to section 13.05.

Bulletin No. 2023–51 1507 December 18, 2023
(2) Anti-cutback and vesting schedule change provision. Each Qualified Pre-approved Plan must
specifically provide for the protection required under § 411(a)(10) and (d)(6) in the event that the
Adopting Employer amends the plan (including by revising the options selected in the adoption
agreement or adopting a new plan). A plan may not be amended in a manner that could result in
the elimination of a benefit to the extent the benefit is required to be protected under § 411(d)
(6) with respect to the plan of any Adopting Employer, unless the amendment is permitted under
§ 1.401(a)-4 and either § 1.411(d)-3 or 1.411(d)-4. See section 9.02(5) for anti-cutback plan
provisions that are required in situations in which a plan becomes top-heavy. See § 411(d)(6)(C)
and § 1.411(d)-4, Q&A-2(d), for certain exceptions applicable to ESOPs.
(3) Adopting Employer modification to satisfy §§ 415 and 416. Each Qualified Pre-approved
Plan must provide that plan provisions may be amended by the Adopting Employer to the extent
necessary to satisfy § 415 or 416 because of the required aggregation of multiple plans under
these sections. Generally, a space should be reserved in the plan with instructions for the Adopting
Employer to add such language as necessary to satisfy §§ 415 and 416, if applicable. In addition,
a space must be provided in the plan for the Adopting Employer to specify the interest rate and
mortality tables used for purposes of establishing the present value of accrued benefits in order
to compute the top-heavy ratio under § 416, if applicable. Such a space must be included in both
defined contribution plans and defined benefit plans. These provisions must be included in the
adoption agreement of an Adoption Agreement Plan.
(4)
Aggregation for § 415 compliance. Each Qualified Pre-approved Plan must provide for
aggregation of all of an Adopting Employer’s defined contribution plans and all of an Adopting
Employer’s defined benefit plans as necessary to satisfy § 415(b) and (c) (each as modified by
§ 415(h)), and § 415(f).
(5) Top-heavy requirements. Each Qualified Pre-approved Plan must either provide that all of the
additional requirements applicable to top-heavy plans (described in § 416) apply at all times, or
provide that such requirements apply automatically if the plan is top-heavy, regardless of how
the options in the plan are completed. In the latter case, all of the requirements for determining
whether the plan is top-heavy must be included in the plan. (See Questions T-35 and T-36 of
§ 1.416-1.) In addition, a plan that is subject to the top-heavy requirements and that does not
include vesting rules for all years that are at least as favorable to participants as those set forth in
§ 416(b) must specifically provide that any vesting that occurs while the plan is top-heavy will not
be reduced if the plan ceases to be top-heavy.
(6) Provision regarding reliance. Each Qualified Pre-approved Plan must include, in close
proximity to the signature line, a statement that describes the limitations on Adopting Employer
reliance on an Opinion Letter. See section 12.
(7) Provision regarding conflicting trust provisions. Each Qualified Pre-approved Plan must
include a statement that the provisions of the single plan document or basic plan document override
any conflicting provision included in Trust or Custodial Account Documents used with the plan.
13
(8) Dated signatures and adoption agreement provisions. Each Qualified Pre-approved Plan must
include an Adopting Employer signature and date line. The plan also must include a statement that
the Provider will inform the Adopting Employer of any amendments made to the plan or of the
discontinuance of the plan. The Adopting Employer must sign and date the adoption agreement
or signature page of the plan when it first adopts the plan and must complete, sign, and date a
new adoption agreement or signature page if the plan has been restated. In addition, the Adopting
Employer must complete a new dated adoption agreement or signature page if the Adopting
Employer modifies any prior elections or makes new elections. The signature requirement may
be satisfied by an electronic signature that reliably authenticates and verifies the adoption of the
adoption agreement or single plan document, or the restatement, amendment, or modification
13
Accordingly, if a plan is operated in a manner that is inconsistent with a provision of the single plan document or basic plan document, the plan will incur an operational failure even if
the plan is operated in a manner consistent with a provision of a T
rust or Custodial Account Document that conflicts with the provision of the single plan document or basic plan document.

December 18, 2023 1508 Bulletin No. 2023–51
thereof, by the Adopting Employer. In the case of an Adoption Agreement Plan, the adoption
agreement must state that it is to be used with only one basic plan document and must identify that
document. In addition, the adoption agreement must include a cautionary statement to the effect
that the failure to properly complete the adoption agreement may result in failure of the form of
the plan to meet the Qualification Requirements.
(9) Provider contact information. Each Qualified Pre-approved Plan must include the Provider’s
name, address, and telephone number (or a space for the address and telephone number of the
Provider’s authorized representative) for inquiries by Adopting Employers regarding the adoption
of the plan, the meaning of plan provisions, or the effect of the Opinion Letter. Each Qualified Pre-
approved Plan may provide additional contact information (such as an email address).
(10) Definition of employee
(a) In general. Each Qualified Pre-approved Plan must define an employee as any employee of the
Adopting Employer maintaining the plan or of any Related Employer. The definition of employee
also must include any individual treated under § 414(n) or (o) as an employee of any Employer
described in the preceding sentence.
(b) ESOPs. With respect to a Qualified Pre-approved Plan that includes an ESOP, employees who
meet the definition of employee in section 9.02(10)(a) may not participate in the ESOP unless
they are employed by the corporation that issues the stock held by the ESOP or by any corporation
that is a member of the same controlled group of corporations (within the meaning of § 1563(a),
as modified by § 409(l)(4)(B) and (C) and as determined without regard to § 1563(a)(4) and
(e)(3)(C)). For all other purposes under the ESOP, including nondiscrimination and coverage,
employees who meet the definition of employee in section 9.02(10)(a) are treated as employees.
(11) Crediting of service taking into account § 414(b), (c), (m), (n), and (o). Each Qualified Pre-
approved Plan must credit all service with any Related Employer as service with the Adopting
Employer maintaining the plan. In addition, in the case of an individual treated under § 414(n)
or (o) as an employee of any Employer described in the previous sentence, service with that
Employer must be credited to such individual.
(12) Uniformed Services Employment and Reemployment Rights Act and § 414(u). Each Qualified
Pre-approved Plan must include a provision reflecting the requirements of § 414(u). See Rev.
Proc. 96-49, 1996-2 CB 369.
(13) Normal retirement age. Each Qualified Pre-approved Plan that is a pension plan and that is
not a Governmental Plan must have a normal retirement age that is not less than age 55.
.03 Additional provisions required in a Qualified Pre-approved Plan that is intended to be a
Standardized Plan. Each Qualified Pre-approved Plan that is intended to be a Standardized Plan
must meet the following requirements:
(1) Plan benefits all employees. Under the provisions governing eligibility and participation, the
plan by its terms must benefit all employees (regardless of whether any Employer is treated as
operating separate lines of business under § 414(r)) except those employees that may be excluded
under § 410(a)(1) or (b)(3). The plan may provide options as to whether some or all of the employees
described in § 410(a)(1) or (b)(3) are excluded, provided that the criteria for excluding employees
described in § 410(a)(1) or (b)(3) apply uniformly to all employees. A Standardized Plan generally
may not deny an accrual or allocation to an employee eligible to participate merely because the
employee is not an active employee on the last day of the plan year or has failed to complete a
specified number of hours of service during the year. However, the plan may deny an allocation
or accrual to an employee who is eligible to participate if the employee terminates service during
the plan year with not more than 500 hours of service and is not an active employee on the last
day of the plan year. A Qualified Pre-approved Plan will not fail to satisfy the requirements of this
section 9.03(1) merely because the plan provides, either as the result of an elective provision or

Bulletin No. 2023–51 1509 December 18, 2023
by default in the absence of an election to the contrary, that individuals who become employees,
within the meaning of section 9.02(10)(a), as the result of a transaction described in § 410(b)(6)
(C) are excluded from eligibility to participate in the plan during the period beginning on the
date of the transaction and ending on a date that is not later than the earlier of the last day of the
first plan year beginning after the date of the transaction or the date of a significant change in
the plan or in the coverage of the plan. A transaction described in § 410(b)(6)(C) is an asset or
stock acquisition, merger, or other similar transaction involving a change in the employer of the
employees of a trade or business.
(2) Eligibility is not more favorable for highly compensated employees. The eligibility requirements
under the plan are not more favorable for highly compensated employees (as defined in § 414(q))
than for other employees.
(3) Allocations and benefits are based on total compensation. Under the plan, allocations, in the
case of a defined contribution plan (other than any cash or deferred arrangement portion), or
benefits, in the case of a defined benefit plan, are determined on the basis of total compensation.
The plan must provide that, for purposes of allocation, the definition of total compensation is
“participant’s compensation” within the meaning of § 415(c)(3), or compensation that otherwise
satisfies § 414(s) and § 1.414(s)-1(c).
(4) Section 401(a)(4) safe harbors. Unless the plan is a target benefit plan or a § 401(k) and/or
401(m) plan, the plan must satisfy, by its terms, one of the design-based safe harbors described in
§ 1.401(a)(4)-2(b)(2) (taking into account § 1.401(a)(4)-2(b)(4)) or § 1.401(a)(4)-3(b)(3), (4), or
(5) (taking into account § 1.401(a)(4)-3(b)(6)).
(5) Benefits, rights and features are available to all employees. All benefits, rights, and features
under the plan (other than those, if any, that have been prospectively eliminated) are currently
available to all employees benefiting under the plan. (For information regarding benefits, rights,
and features and the determination of current availability, see § 1.401(a)(4)-4.)
(6) Past service credit satisfies safe harbor standard. Any past service credit under the plan
satisfies the safe harbor in § 1.401(a)(4)-5(a)(3).
(7) Hardship distribution satisfies safe-harbor standards. Any hardship distribution satisfies the
safe harbor standards in § 1.401(k)-1(d)(3).
.04 Additional provisions required in a Qualified Pre-approved Plan that includes an ESOP. Each
Qualified Pre-approved Plan that includes an ESOP feature must include the following provisions:
(1) Identification as an ESOP. A statement that the plan is an employee stock ownership plan
within the meaning of § 4975(e)(7) and is designed to invest primarily in employer stock;
(2) Definition of employer stock. A provision that defines employer stock in accordance with
§ 409(l)(1) or (2);
(3) Diversification. Provisions that meet the diversification requirements of § 401(a)(28)(B) or, if
applicable, § 401(a)(35);
(4) Valuation, independent appraiser, and allocation of earnings. Provisions that meet the
valuation, independent appraiser, and allocation of earnings requirements set forth in § 401(a)(28)
(C), § 54.4975-11(d)(5), and Rev. Rul. 80-155, 1980-1 CB 84;
(5) Voting. Provisions that meet the voting requirements of § 409(e);
(6) Right-to-demand and put-option. Provisions that meet the right-to-demand and put-option
requirements of § 409(h), to the extent applicable;

December 18, 2023 1510 Bulletin No. 2023–51
(7) Distribution. Provisions that meet the distribution requirements of § 409(o);
(8) Exempt loans. Provisions that set forth the requirements relating to exempt loans as described
in § 4975(d)(3), § 54.4975-7, and § 54.4975-11(c);
(9) Annual addition. Provisions that meet the ESOP annual addition requirements described in
§ 1.415(c)-1(f) and, if the ESOP is maintained by an employer that is a C corporation (as defined
in § 1361(a)(2)), the requirements described in § 415(c)(6);
(10) Forfeitures. If an ESOP provides for forfeitures, provisions that meet the forfeiture requirement
of § 54.4975-11(d)(4);
(11) S corporation employer securities. If an ESOP holds employer securities consisting of stock
in an S corporation (as defined in § 1361(a)(1)), provisions that meet the requirements of § 409(p)
and § 1.409(p)-1;
(12) C corporation employers. If an ESOP is maintained by employers that are C corporations,
provisions that meet the requirements of § 409(n); and
(13) Identification as C or S corporation. Provisions (in the plan document or adoption agreement)
that identify the Adopting Employer as either a C corporation or an S corporation.
(14) Definition of employee. See section 9.02(10)(b).
.05 Additional provisions required in a Qualified Pre-approved Plan that includes a Cash Balance
Plan
(1) Prior benefit structures protected. All Cash Balance Plans must ensure compliance with the
anti-cutback provisions of § 411(d)(6). To receive an Opinion Letter under this revenue procedure,
a Cash Balance Plan must provide that, at all times, any benefits accrued prior to the Adopting
Employer’s adoption of the Pre-approved Plan (and other benefits protected under § 411(d)(6)
(B)) are protected. A Cash Balance Plan that was the subject of a Conversion Amendment must
comply with the provisions of § 411(b)(5)(B)(iii) and § 1.411(b)(5)-1(c). However, an Opinion
Letter will not be issued for a plan that uses an opening hypothetical account balance as described
in § 1.411(b)(5)-1(c)(3) to meet the requirements of § 1.411(b)(5)-1(c).
(2) Step-rate structure of Principal Credits. Cash Balance Plans that include any structure of
Principal Credits that increase with age, service, or any other measure during a participant’s
employment must be definitely determinable, operationally nondiscriminatory, and at all times
in compliance with the “133 1/3 percent rule” of § 411(b)(1)(B) and the regulations thereunder.
Employers may not rely on the Opinion Letter with respect to the requirements of § 411(b)(1)
for increasing Principal Credit schedules that are created by Adopting Employers by completing
blanks in the plan formula, but may rely on the Opinion Letter with respect to the requirements of
§ 41 1(b)(1) for increasing Principal Credit schedules specified in the Pre-approved Plan document.
.06 Provisions required in a Section 403(b) Pre-approved Plan.
(1) Provider amendments. Each Section 403(b) Pre-approved Plan must include a procedure for
amendments by the Provider, so that changes in the Code, or in regulations or other guidance
published in the IRB, and any correction of the plan may be applied to all Adopting Employers.
The procedure for amendments by the Provider also must state that, for purposes of the Pre-
approved Plan program, the Provider will no longer have the authority to amend the plan on
behalf of the Adopting Employer as of the date the plan is treated as an individually designed plan
pursuant to section 13.05.
(2) Adopting Employer modification to satisfy § 415. Each Section 403(b) Pre-approved Plan must
provide that plan provisions may be amended by the Adopting Employer to the extent necessary

Bulletin No. 2023–51 1511 December 18, 2023
to satisfy § 415 because of the required aggregation of multiple plans under these sections.
Generally, a space should be reserved in the plan with instructions for the Adopting Employer
to add such language as necessary to satisfy § 415. These provisions must be included in the
adoption agreement of an Adoption Agreement Plan.
(3) Aggregation for § 415 compliance. Each Section 403(b) Pre-approved Plan must provide for
aggregation of all of an Adopting Employer’s defined contribution plans as necessary to satisfy
§ 415(c) (as modified by § 415(h)), (f), and (k)(4).
(4) Provision regarding reliance. Each Section 403(b) Pre-approved Plan must include, in close
proximity to the signature line, a statement that describes the limitations on Adopting Employer
reliance on an Opinion Letter. See section 12.
(5) Provision regarding conflicting provisions in Investment Arrangements or other documents.
Each Section 403(b) Pre-approved Plan must provide that, in the event of any conflict between
the terms of the single plan document or the basic plan document and adoption agreement, as
applicable, and the terms of Investment Arrangements under the plan (or of any other documents
incorporated by reference into the plan), the terms of the single plan document or the basic plan
document and adoption agreement, as applicable, will govern. See section 12.03(5) for the effect
on reliance in the event of a conflict. An Employer that adopts a Section 403(b) Pre-approved Plan
should take this requirement into account in considering Investment Arrangements to be offered
under the plan, as well as other documents that may be incorporated by reference. Since the terms
of Investment Arrangements under a Section 403(b) Pre-approved Plan must be incorporated by
reference into the plan and those arrangements may not have any provisions that are inconsistent
with § 403(b), plan terms that are required in a single plan document or the basic plan document
and adoption agreement, as applicable, under this section 9 should not create a conflict with the
terms of the Investment Arrangements under a properly drafted Section 403(b) Pre-approved Plan.
If there nevertheless is a conflict, the terms of the single plan document or the basic plan document
and adoption agreement, as applicable, must control.
14
(6) Dated signatures and adoption agreement provisions. Each Section 403(b) Pre-approved
Plan must include an Adopting Employer signature and date line. The plan also must include a
statement that the Provider will inform the Adopting Employer of any amendments made to the
plan or of the discontinuance of the plan. The Adopting Employer must sign and date the adoption
agreement or signature page of the plan when it first adopts the plan and must complete, sign,
and date a new adoption agreement or signature page if the plan has been restated. In addition,
the Adopting Employer must complete a new dated adoption agreement or signature page if it
modifies any prior elections or makes new elections. The signature requirement may be satisfied
by an electronic signature that reliably authenticates and verifies the adoption of the adoption
agreement or single plan document, or the restatement, amendment, or modification thereof, by
the Adopting Employer. In the case of an Adoption Agreement Plan, the adoption agreement must
state that it is to be used with only one basic plan document and must identify that document. In
addition, the adoption agreement must include a cautionary statement to the effect that the failure
to properly complete the adoption agreement may result in failure of the form of the plan to meet
the Section 403(b) Requirements.
(7) Provider contact information. Each Section 403(b) Pre-approved Plan must include the
Provider’s name, address, and telephone number (or a space for the address and telephone number
of the Provider’s authorized representative) for inquiries by Adopting Employers regarding the
adoption of the plan, the meaning of plan provisions, or the effect of the Opinion Letter. Each
Section 403(b) Pre-approved Plan may provide additional contact information (such as an email
address).
14
Accordingly, if a plan is operated in a manner that is inconsistent with a provision of the single plan document or basic plan document, the plan will incur an operational failure even if
the plan is operated in a manner consistent with a provision of a T
rust or Custodial Account Document that conflicts with the provision of the single plan document or basic plan document.

December 18, 2023 1512 Bulletin No. 2023–51
(8) Definition of employee. Each Section 403(b) Pre-approved Plan must define an employee as
any employee of the Adopting Employer maintaining the plan or any other Related Employer.
(9) Crediting of service taking into account § 414(b), (c), (m), and (o). Each Section 403(b) Pre-
approved Plan must credit all service with any Related Employer as service with the Adopting
Employer maintaining the plan.
(10) Uniformed Services Employment and Reemployment Rights Act and § 414(u). Each Section
403(b) Pre-approved Plan must include a provision reflecting the requirements of § 414(u). See
Rev. Proc. 96-49.
(11) Inclusion of Investment Arrangements. A Section 403(b) Pre-approved Plan includes the
Investment Arrangements under the plan in addition to the single plan document or the basic
plan document and adoption agreement. Every Section 403(b) Pre-approved Plan must therefore
incorporate by reference the terms of the Investment Arrangements under the plan. While the IRS’s
review of an application for an Opinion Letter is limited to the terms of the single plan document
or the basic plan document and adoption agreement, as applicable, the terms of Investment
Arrangements and other documents that are incorporated by reference in the plan must satisfy
applicable law and may not have any provisions that are inconsistent with the Section 403(b)
Requirements. For example, if the forms of annuity benefit available under a plan are described
in the Investment Arrangements under the plan, the terms of the Investment Arrangements must
satisfy, if applicable to the plan, the joint and survivor annuity requirements of section 205 of the
Employee Retirement Income Security Act of 1974 (ERISA), Pub. L. 93-406, 88 Stat. 82954, and
any applicable related rules, such as rules relating to transfers of benefits that are subject to the
joint and survivor annuity requirement, and may not have any provisions that are inconsistent with
the Section 403(b) Requirements.
(12) Plan must satisfy Section 403(b) Requirements independent of Investment Arrangements.
The IRS’s review of a Section 403(b) Pre-approved Plan will consider only the terms of the single
plan document or the basic plan document and adoption agreement, as applicable. Accordingly,
the provisions described in this section 9.06 (and sections 9.07 and 9.08, if applicable) must
be included in the single plan document or the basic plan document or adoption agreement, as
appropriate, of every Section 403(b) Pre-approved Plan, regardless of the terms of any Investment
Arrangements under the plan or any other documents that may be incorporated by reference. This
does not preclude the adoption of a Section 403(b) Pre-approved Plan (including a Standardized
Plan) if different Investment Arrangements under a plan have different features or prevent the
inclusion of additional provisions in the terms of the Investment Arrangements under the plan or
other documents incorporated by reference. It also does not prevent a Section 403(b) Pre-approved
Plan from using Investment Arrangements that are more restrictive than required by § 403(b) or
the single plan document or the basic plan document and adoption agreement. However, the terms
of the single plan document or the basic plan document and adoption agreement, as applicable,
must satisfy the requirements of applicable law and this section 9.06 (and sections 9.07 and 9.08,
if applicable) independent of any Investment Arrangements under the plan or any other documents
incorporated by reference. For example, an Adopting Employer’s Adoption Agreement Plan may
offer both Investment Arrangements that permit loans and Investment Arrangements that do
not permit loans. In this case, (1) the basic plan document must include provisions reflecting
the Section 403(b) Requirements, including §§ 1.403(b)-6 and 1.72(p)-1, and (2) the basic plan
document and adoption agreement, as completed by the Adopting Employer, must provide that, to
the extent permitted by the terms governing the applicable Investment Arrangement, participant
loans are available. Similarly, for example, if an Adopting Employer’s Single Document Plan
offers both Investment Arrangements that permit loans and Investment Arrangements that do not
permit loans, then the single plan document must include provisions reflecting the Section 403(b)
Requirements, including §§ 1.403(b)-6 and 1.72(p)-1, and must provide that, to the extent
permitted by the terms governing the applicable Investment Arrangement, participant loans are
available.

Bulletin No. 2023–51 1513 December 18, 2023
(13) Vesting. A Section 403(b) Pre-approved Plan may provide a vesting schedule for
contributions other than elective deferrals, rather than provide for full and immediate vesting of
the contributions. Except in the case of certain Nonstandardized Plans described in this section
9.06(13), contributions other than elective deferrals (and earnings thereon) under a Section 403(b)
Pre-approved Plan must vest at least as rapidly as would be required to satisfy the minimum
vesting requirements of § 411(a)(2)(B) applicable to a qualified plan under § 401(a), even if the
plan is not subject to the parallel minimum vesting requirements under section 203 of ERISA. A
Nonstandardized Plan that is designed to be used for a plan that is not subject to the minimum
vesting requirements of section 203 of ERISA (for example, a Governmental Plan) is not required
to provide that contributions other than elective deferrals will vest at least as rapidly as would
be required to satisfy § 411(a)(2)(B). Every Section 403(b) Pre-approved Plan that provides a
vesting schedule for contributions other than elective deferrals must also satisfy the following
requirements: (1) the portion of a participant’s interest in the plan that is not vested must be
maintained in a separate account for the participant that is treated as a separate contract to which
§ 403(c) (or, in case of a custodial account, § 401(a)) applies, (2) as amounts in the participant’s
separate account become nonforfeitable, they must be removed from the separate account and
treated as amounts held under a § 403(b) plan, to the extent permitted under § 1.403(b)-3(d)(2)
(ii), and (3) all nonvested amounts remaining in the participant’s separate account must become
nonforfeitable upon termination of the plan.
(14) Appendix of administrative responsibilities. Every Section 403(b) Pre-approved Plan must
include an appendix to the plan that will be used to identify the parties responsible for the various
administrative functions under the plan that are necessary to comply with the Section 403(b)
Requirements and other tax requirements, including the requirements that apply on the basis of
the aggregated Investment Arrangements issued to a participant under the plan, and will list all the
vendors of Investment Arrangements approved for use under the plan. Changes to the information
in the required appendix will not affect the Adopting Employer’s ability to rely on an Opinion
Letter.
(15) Identifying category of Employer and plan. The adoption agreement or single plan document
of every Section 403(b) Pre-approved Plan must satisfy the following requirements:
(a) Although a single adoption agreement may be made available to different categories of
Employers, the adoption agreement must require the Adopting Employer to show its status as an
Employer eligible to maintain a § 403(b) plan by indicating whether the Adopting Employer is:
(i) A government-sponsored educational organization described in § 170(b)(1)(A)(ii) (a public
school);
(ii) A tax-exempt organization described in § 501(c)(3) that is exempt from tax under § 501(a);
(iii) An employer of a minister described in § 414(e)(5)(A); or
(iv) A minister described in § 414(e)(5)(A).
(b) The adoption agreement or single plan document must require the Adopting Employer to show
its status with respect to the nondiscrimination requirements in § 1.403(b)-5 by indicating whether
the plan is:
(i) A Governmental Plan;
(ii) A plan of an Adopting Employer that is a Church or QCCO for employees of the Church or
QCCO; or
(iii) A plan not described in (i) or (ii) of this section 9.06(15)(b).

December 18, 2023 1514 Bulletin No. 2023–51
(16) Separate Section 403(b) Pre-approved Plan for Retirement Income Account. A single Section
403(b) Pre-approved Plan may not be used for both a Section 403(b) Pre-approved Plan that is
a Retirement Income Account and a Section 403(b) Pre-approved Plan that is not a Retirement
Income Account. Thus, if a Provider also has a Section 403(b) Pre-approved Plan that is not a
Retirement Income Account, a separate Section 403(b) Pre-approved Plan is required for a plan
that is intended to constitute a Retirement Income Account.
.07 Additional provisions required in a Section 403(b) Pre-approved Plan that is intended to be a
Standardized Plan. Each Section 403(b) Pre-approved Plan that is intended to be a Standardized
Plan must meet the following requirements:
(1) Hardship distribution satisfies safe-harbor standards. Any hardship distribution satisfies the
safe harbor standards in the regulations under § 401(k).
(2) Section 415 treatment of § 403(b) annuity contracts. Under § 1.415(f)-1(a)(3), all § 403(b)
annuity contracts purchased by an Employer for a participant are treated as one § 403(b) annuity
contract for purposes of § 415. Section 1.415(f)-1(f)(2) includes a special rule providing that,
if a participant on whose behalf a § 403(b) annuity contract is purchased is in control of any
employer for a limitation year, then the § 403(b) annuity contract is aggregated with all other
defined contribution plans maintained by that employer. For these purposes, a custodial account
and a Retirement Income Account are each treated as a § 403(b) annuity contract. Every Section
403(b) Pre-approved Plan that is intended to be a Standardized Plan must include plan language
reflecting these rules. In particular, the plan language must coordinate the application of the § 415
limits to all the Standardized Plans of the Adopting Employer and its Related Employers so that,
if the only § 403(b) plans maintained by the Adopting Employer and its Related Employers are
Standardized Plans, then the plans will satisfy § 415(c) and § 1.415(f)-1(a)(3) without requiring
the addition of overriding plan language.
(3) Elective deferrals only or additional requirements for contributions that are not elective
deferrals. A Section 403(b) Pre-approved Plan that is intended to be a Standardized Plan must
provide either:—
(a) That the only contributions that an Adopting Employer may elect to provide under the plan are
elective deferrals, or
(b) With respect to any contributions other than elective deferrals, the plan must satisfy all of the
following requirements:
(i) Plan benefits all employees. Under the provisions governing eligibility and participation, the
plan by its terms must benefit all employees except those employees that may be excluded under
§ 1.410(b)-6 and employees listed in § 1.403(b)-5(b)(4)(ii)(D) or (E). The plan may provide options
as to whether some or all of the employees described in § 1.410(b)-6 are excluded, provided that
the criteria for excluding employees described in § 1.410(b)-6 apply uniformly to all employees.
A Standardized Plan generally may not deny an allocation to an employee eligible to participate
merely because the employee is not an active employee on the last day of the plan year or has
failed to complete a specified number of hours of service during the year. However, the plan may
deny an allocation to an employee who is eligible to participate if the employee terminates service
during the plan year with not more than 500 hours of service and is not an active employee on
the last day of the plan year. A plan will not fail to satisfy the requirements of this section 9.07(3)
with respect to contributions other than elective deferrals merely because the plan provides, either
as the result of an elective provision or by default in the absence of an election to the contrary,
that individuals who become employees, within the meaning of section 9.06(8), as the result of
a transaction described in § 410(b)(6)(C) are excluded from eligibility to participate in the plan
during the period beginning on the date of the transaction and ending on a date that is not later
than the earlier of the last day of the first plan year beginning after the date of the transaction or
the date of a significant change in the plan or in the coverage of the plan. A transaction described

Bulletin No. 2023–51 1515 December 18, 2023
in § 410(b)(6)(C) is an asset or stock acquisition, merger, or other similar transaction involving a
change in the employer of the employees of a trade or business.
(ii) Eligibility is not more favorable for highly compensated employees. The eligibility requirements
under the plan are not more favorable for highly compensated employees (as defined in § 414(q))
than for other employees.
(iii) Allocations are based on total compensation. Under the plan, allocations (other than any
elective deferral portion) are determined on the basis of total compensation. The plan must
provide that, for purposes of allocations, the definition of total compensation is “participant’s
compensation” within the meaning of § 415(c)(3), or compensation that otherwise satisfies
§ 414(s) and § 1.414(s)-1(c).
(iv) Section 401(a)(4) safe harbors. If the plan provides for contributions other than elective
deferrals and matching contributions, the plan must satisfy one of the design-based safe harbors
described in § 1.401(a)(4)-2(b)(2) with respect to the contributions.
(v) Benefits, rights and features are available to all employees. All benefits, rights, and features
under the plan (other than those, if any, that have been prospectively eliminated) are currently
available to all employees benefiting under the plan. (For information regarding benefits, rights,
and features and the determination of current availability, see § 1.401(a)(4)-4.)
.08 Additional provisions required in a Section 403(b) Pre-approved Plan intended to be a
Retirement Income Account. Each Section 403(b) Pre-approved Plan that is intended to be a
Retirement Income Account must meet the following requirements:
(1) Identification as Retirement Income Account. The plan must state the intent to be a Retirement
Income Account in accordance with § 1.403(b)-9(a)(2)(ii).
(2) Separate accounting, investment performance, and exclusive benefit. The terms of the plan
must satisfy the separate accounting, investment performance, and exclusive benefit requirements
of § 1.403(b)-9(a)(2)(i).
(3) Life annuity requirements. If the plan provides for benefits in the form of a life annuity, the
plan must satisfy the present value and benefit guarantee requirements of § 1.403(b)-9(a)(5), and
the present value must be based on reasonable actuarial assumptions that are either set forth in the
plan or incorporated by reference into the plan.
(4) Nondiscrimination requirements. The terms of the plan must set forth the nondiscrimination
requirements of § 403(b)(12). The plan also must state that the nondiscrimination requirements
are applied to any employee other than an employee of a QCCO or Church.
(5) Multiple Employers that are not Related Employers. In the case of multiple Employers that are
not Related Employers participating in the plan, each Adopting Employer must identify whether
it is a Church, QCCO, non-QCCO, or minister.
SECTION 10. OPINION LETTERS - SCOPE
.01 General limits on Opinion Letters. An Opinion Letter constitutes a determination that the form of
a Pre-approved Plan satisfies the Qualification Requirements or the Section 403(b) Requirements,
as applicable, subject to the requirements and limitations of this revenue procedure. An Opinion
Letter is issued only to a Provider or Mass Submitter. The IRS’s review of a Provider’s or Mass
Submitter’s application for an Opinion Letter for a Pre-approved Plan will consider only the terms

December 18, 2023 1516 Bulletin No. 2023–51
of the single plan document or the basic plan document and adoption agreement, as applicable.
The IRS’s review will not consider, and an Opinion Letter will not express an opinion with respect
to, the terms of any Trust or Custodial Account Document for (or Investment Arrangement under)
the plan of any Adopting Employer or any other documents that may be incorporated by reference
into an Adopting Employer’s plan. An Opinion Letter for a Qualified Pre-approved Plan does not
constitute a ruling or a determination as to the exempt status of related trusts or custodial accounts
under § 501(a).
.02 Plans for which an Opinion Letter will not be issued.
(1) For a Pre-approved Plan, an Opinion Letter will not be issued for:
(a) A plan under which the § 415 limitations are incorporated by reference;
(b) A plan under which the actual contribution percentage (ACP) test under § 401(m)(2) is
incorporated by reference;
(c) A Nonstandardized Plan that provides for hardship distributions under circumstances not
described in the safe harbor standards in the regulations under § 401(k), unless these distributions
are subject to nondiscriminatory and objective criteria included in the plan;
(d) A plan that includes blanks or fill-in provisions for the Adopting Employer to complete,
unless the provisions have parameters that preclude the Adopting Employer from completing
the provisions in a manner that could violate the Qualification Requirements or Section 403(b)
Requirements, as applicable;
(e) A plan designed to satisfy the provisions of § 105;
(f) A plan that includes § 401(h) accounts; or
(g) A plan that includes purported fail-safe provisions for § 401(a)(4) or the average benefit test
under § 410(b).
(2) For a Qualified Pre-approved Plan, in addition to the circumstances described in section
10.02(1), an Opinion Letter will not be issued for:
(a) A multiemployer plan;
(b) A single-employer collectively bargained plan (however, this rule does not preclude an
employer from covering employees of the employer that are included in a unit covered by a
collective bargaining agreement if it is adopting a Pre-approved Plan for its non-bargaining
employees or from adopting a Pre-approved Plan pursuant to such agreement as a single-employer
plan that covers only bargaining employees of the employer);
(c) A stock bonus plan other than an ESOP;
(d) An ESOP that is a combination of a stock bonus plan and a money purchase plan;
(e) An ESOP that provides for the holding of preferred employer stock, including an ESOP that
holds stock described in § 409(l)(3);
(f) A Statutory Hybrid Plan with any of the following features:
(i) A statutory hybrid benefit formula that is not a Cash Balance Formula, such as a formula under
which benefits are determined by reference to the current value of an accumulated percentage of
the participant’s average compensation (a Pension Equity Plan or PEP);

Bulletin No. 2023–51 1517 December 18, 2023
(ii) A provision under which Interest Credits are based on rates of return that are subject to
participant choice, or any rate that does not meet the requirements of § 1.411(b)(5)-1(d);
(iii) A provision under which a rate used to determine Interest Credits is based on the actual rate of
return on aggregate assets of the plan described in § 1.411(b)(5)-1(d)(5)(ii)(A) or the rate of return
on certain regulated investment companies (RICs) described in § 1.411(b)(5)-1(d)(5)(iv) (unless
the plan provides that the rate used to determine Interest Credits is equal to the actual rate of return
on the aggregate assets of the plan), or is based on or equal to the actual rate of return on a subset
of plan assets (as described in § 1.411(b)(5)-1(d)(5)(ii)(B));
(iv) A Conversion Amendment, except for plans providing that, after the effective date of the
Conversion Amendment, a participant’s accrued benefit is equal to the sum of accruals under the
prior formula plus the benefit based on the Cash Balance Formula (“A+B Conversion”);
(v) A provision that uses the 3-percent accrual rule or the fractional accrual rule under § 411(b)(1)
(A) or (C) to satisfy the accrued benefit requirements under § 411(b)(1);
(vi) A provision for funding exclusively through insurance contracts as described in § 412(e)(3);
or
(vii) A provision for Offsets of benefits accrued under another plan (the “offsetting plan”), unless:
(A) The Offset is applied on an accumulated basis at the participant’s annuity starting date, rather
than offsetting each year’s Principal Credit by that year’s accruals or contributions under the
offsetting plan;
(B) If plan provisions are consistent with treatment of the Cash Balance Formula as a lump
sum-based benefit formula under § 1.411(a)(13)-1(d)(3), then the offsetting plan is a defined
contribution plan, and the Offset is applied by subtracting the account balance under the defined
contribution plan from the hypothetical account balance under the Cash Balance Formula prior to
converting the balance to an annuity benefit;
(C) The Offset satisfies the safe-harbor requirements of § 1.401(a)(4)-8(d) (except that the Offset
can be computed by subtracting the account balance under the offsetting plan from the hypothetical
account balance under the Cash Balance Formula), including the requirement that the offsetting
plan may not be a § 401(k) plan or a § 401(m) plan;
(D) For the purpose of determining the amount of the Offset against any defined benefit formula,
the Offset reflects the value of any distributions from the offsetting plan made prior to the
participant’s annuity starting date under the Cash Balance Plan;
(E) The Offset is applied on a uniform basis for all participants;
(F) The plan provides a minimum accrued benefit to participants (expressed as a lifetime annuity
commencing at normal retirement age) of no less than 0.5% of compensation for each year of
credited service, which is not reduced by the Offset applied to other formulas under the plan;
(G) Accrued benefits, considered in conjunction with defined contribution accounts subject to any
Offset, meet nondiscrimination requirements; and
(H) The amount of the Offset, including any procedures and actuarial assumptions for converting
a defined contribution account balance (under a specifically named defined contribution plan) to
an annuity amount, is definitely determinable;
(g) A plan described in § 414(k) (relating to a defined benefit plan that provides a benefit derived
from employer contributions that is based partly on the balance of the separate account of a
participant);

December 18, 2023 1518 Bulletin No. 2023–51
(h) A target benefit plan, other than a plan that, by its terms, satisfies each of the safe harbor
requirements described in § 1.401(a)(4)-8(b)(3)(i), as well as the additional rules in § 1.401(a)
(4)-8(b)(3)(ii) through (vii);
(i) A governmental defined benefit plan that includes a “deferred retirement option plan” (DROP)
feature, or similar provisions in which a participant earns additional benefits for continued
employment post-normal retirement age in the form of credits to a separate account (including a
cash balance account or other arrangement) under the same plan;
(j) A plan under which the actual deferral percentage (ADP) test under § 401(k)(3) is incorporated
by reference;
(k) A fully insured § 412(e)(3) plan, other than a non-statutory hybrid plan that by its terms satisfy
the safe harbor in § 1.401(a)(4)-3(b)(5);
(l) An eligible combined plan within the meaning of § 414(x)(2); or
(m) A Variable Annuity Plan.
(3) For Section 403(b) Pre-approved Plans, in addition to the circumstances described in section
10.02(1), an Opinion Letter will also not be issued for:
(a) A TEFRA church defined benefit plan (see § 1.403(b)-10(f)(2)); or
(b) A plan grandfathered under Rev. Rul. 82-102, 1982-1 CB 62.
.03 Issues an Opinion Letter will not consider.
(1) Title I issues. Except as otherwise provided in guidance, an Opinion Letter does not express an
opinion, and may not be relied upon, with respect to whether any plan is subject to the requirements
of Title I of ERISA or whether a plan satisfies any of those requirements.
(2) Issues related to a Section 403(b) Pre-approved Plan’s coverage of multiple employers that
are not Related Employers. An Opinion Letter does not express an opinion, and may not be relied
upon, with respect to whether the plan satisfies § 403(b)(15) or any other requirements that apply
related to a plan’s coverage of multiple employers that are not Related Employers.
.04 IRS discretion to decline to issue an Opinion Letter. The IRS may, in its discretion, decline to
issue an Opinion Letter for other types of plans or issues not described in this section 10.
.05 Nonapplicability of this revenue procedure to IRAs (including traditional IRAs, Roth IRAs,
SEPs, and Simple IRAs). An Opinion Letter will not be issued under this revenue procedure for
prototype plans intended to meet the requirements for individual retirement arrangements under
§ 408.
15
SECTION 11. ELIGIBILITY FOR THE CYCLE SYSTEM
.01 Initial eligibility for the Cycle system.
15
See the Form 5305 series, which provides model IRA documents that have been pre-approved by the IRS and for which an opinion letter is not needed. See also Rev. Proc. 87-50, 1987-2 CB
647, as modified by Rev. Proc. 97-29, 1997-1 CB 698; Rev. Proc. 98-59, 1998-2 CB 727; and Rev. Proc. 2010-48, 2010-50 IRB 828, for administrative procedures for seeking opinion letters
for individual retirement arrangements under § 408.

Bulletin No. 2023–51 1519 December 18, 2023
(1) In general. An Employer that initially adopts a Pre-approved Plan
16
may adopt the plan at any
time during a Cycle. Subject to section 11.01(2), upon an Employer’s adoption of a Pre-approved
Plan, the plan becomes subject to the rules applicable to the Cycle system and the procedures set
forth in this revenue procedure. In particular, while a plan is subject to the Cycle system, the plan’s
Disqualifying Provisions or Form Defects, as applicable, will have the Remedial Amendment
Periods described in section 6. After a plan is no longer subject to the Cycle system, the plan’s
Disqualifying Provisions or Form Defects will be subject to the Remedial Amendment Period rules
for an individually designed plan. See Rev. Proc. 2022-40. Accordingly, as of the date that a plan
is no longer subject to the Cycle system, if the Remedial Amendment Period for a Disqualifying
Provision or Form Defect would be expired under the rules for individually designed plans, then
the Remedial Amendment Period will be expired, notwithstanding that the Remedial Amendment
Period would not be expired for a Pre-approved Plan. To continue to be eligible for the Cycle
system, the Employer must follow the rules in this revenue procedure for continued eligibility.
See, in particular, sections 11.02 and 13.
(2) Prior plan must be a valid plan. If an Employer that maintains an individually designed plan
amends the plan by adopting a Pre-approved Plan, the form of the individually designed plan
must satisfy the Qualification Requirements or Section 403(b) Requirements, as applicable, at the
time the Pre-approved Plan is adopted. Accordingly, prior to adopting the Pre-approved Plan, the
Employer must have either timely corrected any Disqualifying Provisions or Form Defects in the
individually designed plan before the expiration of the applicable Remedial Amendment Period
for such Disqualifying Provision or Form Defect, or have corrected any plan document failure
under EPCRS.
.02 Continuing eligibility for the Cycle system - requirement to adopt newly approved Pre-
approved Plan. For a Pre-approved Plan adopted pursuant to section 11.01 to continue to be
eligible for the Cycle system, by the end of the Employer Adoption Window for each Cycle, the
Adopting Employer must adopt a newly approved Pre-approved Plan (a newly approved version
of the same plan or a newly approved version of a different Pre-approved Plan). If, during the
Employer Adoption Window for a Cycle, instead of adopting a newly approved Pre-approved
Plan, an Adopting Employer amends its Pre-approved Plan by adopting an individually designed
plan, the plan will continue to be subject to the Remedial Amendment Period rules applicable to
Pre-approved plans until the end of the Employer Adoption Window for that Cycle; however,
for all other purposes, upon adoption of the individually designed plan, the plan will be treated
as an individually designed plan. This means, for example, that if the plan is submitted for a
determination letter during the Employer Adoption Window, the eligibility conditions applicable
to submission of a determination letter set forth in section 9 of Rev. Proc. 2022-40 will apply, and
the scope of plan review will be based on the applicable Required Amendments List, as described
in section 10 of that revenue procedure. In contrast, if, by the end of any Employer Adoption
Window, an Adopting Employer does not amend its Pre-approved Plan by adopting a newly
approved Pre-approved Plan or any other plan, the plan will be treated as an individually designed
plan at the end of that Employer Adoption Window. Accordingly, the plan will become subject
to the rules relating to the Remedial Amendment Period, plan amendment deadlines, and the
eligibility requirements applicable to individually designed plan determination letter applications
set forth in Rev. Proc. 2022-40 at that time. Once a plan is treated as an individually designed plan,
the Adopting Employer is no longer able to rely on an Opinion Letter for that Cycle.
SECTION 12. EMPLOYER RELIANCE ON OPINION LETTER
.01 Standardized Plans.
16
For purposes of this section 11, the term Pre-approved Plan includes a plan that was not in existence in the immediately preceding Cycle and that has been submitted for (but has not yet
received) an Opinion Letter for the Cycle.

December 18, 2023 1520 Bulletin No. 2023–51
(1) Except as set forth in section 12.01(2), (3) and (4), an Adopting Employer of a Standardized
Plan may rely on the plan’s Opinion Letter that the form of the Adopting Employer’s plan satisfies,
in the case of a Section 403(b) Pre-approved Plan, the Section 403(b) Requirements (including,
if applicable, the requirements of §§ 401(a)(4) and 410(b)) or, in the case of a Qualified Pre-
approved Plan, the Qualification Requirements, if:
(a) The Standardized Plan has a currently valid Opinion Letter,
(b) The coverage and contributions or benefits under the Adopting Employer’s plan are not more
favorable for highly compensated employees (as defined in § 414(q)) than for other employees,
(c) The Adopting Employer has not amended the Standardized Plan other than to choose options
provided under the Standardized Plan or to make amendments as described in section 13.02
relating to employer amendments that will not affect reliance, and
(d) In the case of a Section 403(b) Pre-approved Plan, either (i) the only contributions under the
plan are elective deferrals, or (ii) the plan provides for contributions other than elective deferrals
and all of the Adopting Employer’s Related Employers are employers described in § 403(b)(1)(A).
If the plan provides for contributions other than elective deferrals and the Adopting Employer’s
controlled group includes any employer that is not an employer described in § 403(b)(1)(A),
the Adopting Employer may rely on the plan’s Opinion Letter, except with respect to whether
contributions other than elective deferrals under the plan satisfy the requirements of §§ 401(a)(4)
and 410(b).
(2) An Adopting Employer may not rely on an Opinion Letter for a Standardized Plan with respect
to the requirements of § 415 (and § 416, in the case of a Qualified Pre-approved Plan) without
obtaining a determination letter (see section 25) if the Adopting Employer, or, in the case of a
Section 403(b) Pre-approved Plan, any of its Related Employers, maintains or maintained at any
time, another plan, including a Standardized Plan, that was qualified or determined to be qualified
or a 403(b) plan and that covers or covered some of the same participants. An Employer that
adopts a Standardized Plan that is a defined contribution plan is not considered to have maintained
another plan merely because the Employer has maintained another defined contribution plan,
provided such other plan has been terminated prior to the effective date of the Standardized Plan
and no annual additions have been credited to the account of any participant under such other plan
as of any date within a limitation year of the Standardized Plan. For this purpose, a plan that has
been amended from an individually designed plan to a Standardized Plan is not considered another
plan. To be a plan that has been amended from an individually designed plan to a Standardized
Plan and thus for the Employer to be able to rely on the Standardized Plan with respect to the
requirements of §§ 415 and 416 without obtaining a determination letter, the individually designed
plan that has been amended into the Standardized Plan must be of the same type (for example,
both defined benefit plans).
(3) An Adopting Employer of a Standardized Plan may not rely on an Opinion Letter for the
Standardized Plan with respect to:
(a) Whether the timing of any amendment to the Adopting Employer’s plan (or series of
amendments) satisfies the nondiscrimination requirements of § 1.401(a)(4)-5(a), except with
respect to plan amendments granting past service that meet the safe harbor described in § 1.401(a)
(4)-5(a)(3) and are not part of a pattern of amendments that significantly discriminates in favor of
highly compensated employees; or
(b) Whether the Adopting Employer’s plan satisfies the effective availability requirement of
§ 1.401(a)(4)-4(c) with respect to any benefit, right, or feature.
An Employer that adopts a Standardized Plan as an amendment to a plan other than a Standardized
Plan may not rely on the Opinion Letter with respect to whether a benefit, right, or feature that

Bulletin No. 2023–51 1521 December 18, 2023
is prospectively eliminated satisfies the current availability requirements of § 1.401(a)(4)-4, if
applicable.
(4) In the case of a Qualified Pre-approved Plan, an Adopting Employer of a Standardized Plan
that is a defined benefit plan may rely on the plan’s Opinion Letter with respect to the requirements
of § 401(a)(26) only if the plan satisfies the requirements of § 401(a)(26) with respect to its prior
benefit structure (within the meaning of § 1.401(a)(26)-3) or is deemed to satisfy § 401(a)(26)
pursuant to regulations thereunder.
(5) For SIMPLE plans described in § 401(k)(11) and (m)(10), an Adopting Employer may also
rely on the plan’s Opinion Letter regarding whether the form of the Adopting Employer’s plan
satisfies the requirements of those sections.
(6) For a starter 401(k) deferral-only plan described in § 401(k)(16) or a safe harbor deferral-only
plan described in § 403(b)(16), an Adopting Employer may also rely on the plan’s Opinion Letter
regarding whether the form of the Adopting Employer’s plan satisfies the requirements of those
sections.
.02 Nonstandardized Plans.
(1) An Adopting Employer of a Nonstandardized Plan may rely on the plan’s Opinion Letter that
the form of the Adopting Employer’s plan satisfies the Qualification Requirements or Section
403(b) Requirements, as applicable, if:
(a) The Nonstandardized Plan has a currently valid Opinion Letter, and
(b) The Adopting Employer has not amended the plan other than to choose options provided under
the plan or to make amendments as described in section 13.02 relating to employer amendments
that will not affect reliance.
(2) Except as otherwise provided in this section 12.02, an Adopting Employer of a Nonstandardized
Plan may not rely on the plan’s Opinion Letter with respect to the requirements of:
(a) In the case of a Qualified Pre-approved Plan, §§ 401(a)(4), 401(a)(26), 401(l) , 410(b), or
414(s) (or, in the case of a Section 403(b) Pre-approved Plan, §§ 401(a)(4), 410(b), or 414(s)); or
(b) Section 415 (or § 416, in the case of a Qualified Pre-approved Plan) if the Adopting Employer,
or any of its Related Employers, maintains or has ever maintained another plan covering some of
the same participants. For this purpose, whether an employer maintains or has ever maintained
another plan is determined using principles consistent with section 12.01(1).
(3) An Adopting Employer of a Nonstandardized Plan may rely on the plan’s Opinion Letter
with respect to the requirements of § 410(b), if applicable (and, in the case of a Qualified Pre-
approved Plan, § 401(a)(26) (other than the § 401(a)(26) requirements that apply to a prior benefit
structure)), if all nonexcludable employees benefit under the Adopting Employer’s plan.
(4) Nonstandardized Plans may permit an Adopting Employer to select an allocation formula for
contributions other than elective deferrals that satisfies one of the design-based safe harbors in
§ 1.401(a)(4)-2(b)(2) (or, in the case of a Qualified Pre-approved Plan that is a defined benefit
plan, a benefit formula that satisfies one of the design-based safe harbors under § 1.401(a)(4)-3(b)
(3), (4), or (5)), and to select a safe harbor compensation definition for the formula that satisfies
§ 1.414(s)-1(c). If the Adopting Employer selects an allocation formula for contributions other
than elective deferrals that satisfies one of the design-based safe harbors in § 1.401(a)(4)-2(b)
(2) (or, in the case of a Qualified Pre-approved Plan that is a defined benefit plan, § 1.401(a)
(4)-3(b)(3), (4), or (5)), and, if the allocation or benefit formula is based on compensation,
selects a safe harbor compensation definition that satisfies § 1.414(s)-1(c), then the Adopting
Employer of a Nonstandardized Plan may rely on the plan’s Opinion Letter with respect to the

December 18, 2023 1522 Bulletin No. 2023–51
nondiscriminatory amounts requirement under § 401(a)(4), if applicable. An Adopting Employer
of a Nonstandardized Plan that includes § 401(m) matching contributions (and/or, in the case of a
Qualified Pre-approved Plan, § 401(k) contributions) may rely on the plan’s Opinion Letter with
respect to whether the form of the plan satisfies the actual contribution percentage (ACP) test
of § 401(m)(2) (or, in the case of a Qualified Pre-approved Plan, the actual deferral percentage
(ADP) test of § 401(k)(3)) if the Adopting Employer elects to use a safe harbor definition of
compensation in the test. An Adopting Employer of a Nonstandardized Plan that satisfies the
safe harbor requirement described in § 401(m)(11) or 401(m)(12) (or, in the case of a Qualified
Pre-approved Plan, that satisfies the safe harbor requirement described in § 401(k)(12) or 401(k)
(13)) may rely on the plan’s Opinion Letter with respect to whether the form of the Adopting
Employer’s plan satisfies the requirements of § 401(m) (or § 401(k), if applicable), unless the plan
provides for the safe harbor contribution under § 401(m)(11) or 401(m)(12) (or § 401(k)(12) or
401(k)(13), if applicable) to be made under another plan.
(5) For SIMPLE plans described in § 401(k)(11) and (m)(10), an Adopting Employer may also
rely on the plan’s Opinion Letter regarding whether the form of the Adopting Employer’s plan
satisfies the requirements of those sections.
(6) For starter 401(k) deferral-only plans described in § 401(k)(16) or a safe harbor deferral-only
plan described in § 403(b)(16), an Adopting Employer may also rely on the plan’s Opinion Letter
regarding whether the form of the Adopting Employer’s plan satisfies the requirements of those
sections.
(7) Except as set forth in section 9.05(2), an Adopting Employer of a Nonstandardized Plan that is
a Qualified Pre-approved Plan that includes a Cash Balance Formula with a structure of Principal
Credits that increase with age, service, or any other measure during a participant’s employment
may not rely on the plan’s Opinion Letter with respect to the requirements of § 411(b)(1).
.03 Other limitations and conditions on reliance. Notwithstanding any provision in this section
12 to the contrary, the following conditions and limitations regarding reliance by an Adopting
Employer on an Opinion Letter apply with respect to all Pre-approved Plans:
(1) An Adopting Employer may rely on an Opinion Letter for a plan that amends a plan of the
Employer only if the form of the plan that is being amended satisfied the Qualification Requirements
or Section 403(b) Requirements, as applicable. Accordingly, prior to being amended, the plan
must either have timely corrected any Disqualifying Provisions or Form Defects for which the
Remedial Amendment Period is closed or have corrected any plan document failures under the
EPCRS. If this requirement is not met, then the employer (a) is considered to have adopted an
individually designed plan, (b) may not rely on the Opinion Letter for the plan, and (c) is not
considered be on the Cycle system.
17
(2) An Adopting Employer may not rely on an Opinion Letter if the Adopting Employer’s adoption
of a Pre-approved Plan precedes the issuance of an Opinion Letter for the plan.
18
(3) An Adopting Employer may not rely on an Opinion Letter if the adoption agreement or other
elective provisions in the plan are not completed correctly by the Adopting Employer.
(4) An Adopting Employer of any Qualified Pre-approved Plan that is not a Governmental Plan
and that is a pension plan in which the normal retirement age selected by the Adopting Employer
is less than age 62 may not rely on the Opinion Letter that such age is reasonably representative
of the typical retirement age for the employer’s industry, as required by § 1.401(a)-1(b)(2). For
an Adopting Employer of any Qualified Pre-approved Plan that is a Governmental Plan and that
is a pension plan in which the normal retirement age selected by the Adopting Employer does not
satisfy any of the safe harbors described in § 1.401(a)-1(b)(2)(v) of the proposed regulations may
17
The plan may still use EPCRS to correct any failures, and, after correction, then be eligible to adopt a Pre-approved Plan.
18
In this case, in order to have reliance, the Adopting Employer would need to re-adopt the Pre-approved Plan after the issuance of the Opinion Letter for the plan.

Bulletin No. 2023–51 1523 December 18, 2023
not rely on the Opinion Letter that such age is reasonably representative of the typical retirement
age for the employer’s industry, as required by § 1.401(a)-1(b)(2).
(5) An Adopting Employer may not rely on an Opinion Letter with respect to any provision of a
Trust or Custodial Account Document or Investment Arrangement, as applicable, that conflicts
with language in the basic plan document, adoption agreement, or single plan document, as
applicable, even if the Trust or Custodial Account Document or Investment Arrangement includes
language that states that the provisions of the Trust or Custodial Account Document or Investment
Arrangement override the basic plan document, adoption agreement, or single plan document.
19
(6) For a Qualified Pre-approved Plan, the issuance of an Opinion Letter is not a determination by
the IRS that an Adopting Employer’s plan is a Governmental Plan or a church plan (as described
in § 414(e)). For a Section 403(b) Pre-approved Plan, the issuance of an Opinion Letter is not a
determination by the IRS that an Adopting Employer’s plan is a Governmental Plan, or that an
Adopting Employer is a Church or QCCO.
(7) Pursuant to section 14.11, a Provider’s failure to disclose to the IRS a material fact,
misrepresentation of a material fact, or failure to accurately provide any of the information
called for on any form required by this revenue procedure may result in the inability of Adopting
Employers to rely on an Opinion Letter (for example, if there is a failure to disclose to the IRS a
material fact, the IRS may revoke the Opinion Letter due to the failure).
(8) Pursuant to section 15.03(2)(c), if a Mass Submitter fails to identify a material modification,
the failure is considered a material misrepresentation, and an Adopting Employer may not rely on
an Opinion Letter issued with respect to the plan for the modification or any other provision of the
plan that may be affected by the modification.
.04 Reliance equivalent to determination letter. If an Adopting Employer may rely on an Opinion
Letter pursuant to this section 12, the Opinion Letter is equivalent to a determination letter. For
example, the Opinion Letter is treated as a determination letter for purposes of section 23 of Rev.
Proc. 2023-4 (as updated annually), regarding the effect of a determination letter. As provided in
this section 12, the extent of the Adopting Employer’s reliance may be limited.
.05 Obtaining a determination letter. If an Adopting Employer may not rely on a Pre-approved
Plan’s Opinion Letter, the Adopting Employer, if eligible as set forth in section 25, may submit
an application for a determination letter to obtain reliance that the form of the plan satisfies the
Qualification Requirements or Section 403(b) Requirements, as applicable.
SECTION 13. PLAN AMENDMENTS
.01 Provider plan amendments generally. Providers are required to amend their Pre-approved
Plans to ensure that the form of their plans continues to satisfy the Qualification Requirements
or Section 403(b) Requirements, as applicable.
20
Providers must make reasonable and diligent
efforts, as soon as practicable following the adoption of plan amendments, to ensure that Adopting
Employers of the Provider’s plan have actually received and are aware of such plan amendments.
Providers must include the date on which each amendment is adopted by the Provider with the
amendment provided to Adopting Employers. The Provider must have a procedure to notify an
Adopting Employer of amendments and restatements of the plan and to inform the Adopting
19
Accordingly, if a Pre-approved Plan is operated in a manner that is inconsistent with a provision of the basic plan document or single plan document, the plan will incur an operational failure
even if the plan is operated in a manner consistent with a provision of a Trust or Custodial Account Document or Investment Arrangement that conflicts with the provision of the basic plan
document or single plan document.
20
See section 6.04 regarding the requirement to make Interim Amendments.

December 18, 2023 1524 Bulletin No. 2023–51
Employer, when applicable, of the need to timely adopt or amend the plan, including in the case
of both initial adoption and restatement of the plan. The Provider must also notify an Adopting
Employer that failure to timely adopt the plan or restatement, when required, or failure to take into
account plan amendments in the operation of the plan, could result in adverse tax consequences.
A Provider’s failure to comply with these requirements may result in the loss of eligibility to offer
Pre-approved Plans and the revocation of an Opinion Letter that has been issued to the Provider.
.02 Amendments that will not affect reliance. An Adopting Employer may continue to rely on an
Opinion Letter for a Pre-approved Plan if amendments to the plan are made that are described
in paragraphs (1) through (8) of this section 13.02. See section 12.01 and 12.02 for the effect of
amendments on reliance on an Opinion Letter by the Adopting Employer. The following types of
amendments will not cause an Adopting Employer to lose reliance on an Opinion Letter:
(1) Amendments to the plan to add or change a provision (including choosing among options in
the plan) or to specify or change the effective date of a provision, provided the Adopting Employer
is permitted to make the modification or amendment under the terms of the Pre-approved Plan as
well as under the Qualification Requirements or Section 403(b) Requirements, as applicable, and
the provision is identical to a provision in the Pre-approved Plan, except for the effective date;
(2) Sample or model amendments (or an amendment that is substantially similar to a sample or
model amendment in all material respects) that are adopted by the Adopting Employer, that are
published by the IRS, and that specifically provide that their adoption will not cause a plan to fail
to be identical to the Pre-approved Plan;
(3) Amendments that adjust the limitations under §§ 415, 402(g), 401(a)(17), and 414(q)(1)(B)
to reflect annual cost-of-living increases, or add automatic cost-of-living adjustment provisions
to the plan;
(4) Plan language completed by the Adopting Employer if such overriding language is necessary
to satisfy § 415 (or 416, in the case of a Qualified Pre-approved Plan) because of the required
aggregation of multiple plans under that section, in accordance with section 9.02(3) or 9.06(2);
(5) Interim Amendments or Discretionary Amendments that are adopted as a result of a change
in Qualification Requirements or Section 403(b) Requirements, as applicable, for the form of the
plan;
(6) Amendments that reflect a change of a Provider’s name, in which case the Provider must
notify the IRS, in writing, of the change in name and certify that it still satisfies the conditions to
be a Provider described in section 4.01(15) (see also section 19 regarding changes in employer
identification numbers);
(7) Amendments to the administrative provisions in the plan (such as provisions relating to
investments, plan claims procedures, and Adopting Employer’s contact information), provided
the amended provisions are not in conflict with any other provision of the plan, still meet the
requirements of this revenue procedure, and do not cause the plan to fail to satisfy the Qualification
Requirements or Section 403(b) Requirements, as applicable, (see section 15.03(1)(b)(ii) for
additional examples of administrative provisions); and
(8) Amendments with respect to which a closing agreement under the Audit Closing Agreement
Program or a compliance statement under the Voluntary Correction Program of EPCRS has
been issued (see section 6.05(2)(b) of Rev. Proc. 2021-30 regarding the ability of the Adopting
Employer to rely on the Opinion Letter).
.03 Obtaining reliance after employer amendment. If an Adopting Employer may not rely on a
Pre-approved Plan’s Opinion Letter, the Adopting Employer, if eligible in accordance with section
25, may submit an application for a determination letter to obtain reliance that the form of the plan
satisfies the Qualification Requirements or Section 403(b) Requirements, as applicable.

Bulletin No. 2023–51 1525 December 18, 2023
.04 Effect of employer amendments on a plan’s eligibility for the Cycle system. Except as set forth
in section 13.05, employer amendments made to a Pre-approved Plan will not affect the plan’s
eligibility for the Cycle system.
.05 Pre-approved plans treated as individually designed. An Adopting Employer’s Pre-approved
Plan is treated as individually designed (and, as a result of the plan being treated as individually
designed, the Adopting Employer may not rely on the plan’s Opinion Letter (see section 12
regarding reliance), will lose eligibility for the Cycle system as described in this section 13.05
(see section 11 regarding eligibility for the Cycle system), and will be subject to different rules
for applying for a determination letter (see section 25 regarding determination letters)) under the
following circumstances:
(1) An Adopting Employer makes any amendment to a Standardized Plan other than an amendment
listed in section 13.02 or as otherwise described in this section 13.05. In this case, the Adopting
Employer will lose reliance on the Opinion Letter as of the effective date of the amendment but
the plan will remain eligible for the Cycle system (provided that the Adopting Employer adopts
timely Interim Amendments) until the end of the Cycle that includes the effective date.
21
(2) An Adopting Employer amends a Pre-approved Plan (including its adoption agreement, if
applicable) within one year of the date the Adopting Employer initially adopted the Pre-approved
Plan to incorporate a type of plan not permitted in the Opinion Letter program, as described in
section 10.02. In this case, the Adopting Employer is treated as never having had any reliance on
the Opinion Letter and is treated as never having been eligible for the Cycle system.
(3) An Adopting Employer amends a Pre-approved Plan (including its adoption agreement, if
applicable) more than one year after the date the Adopting Employer initially adopted the Pre-
approved Plan to incorporate a type of plan not permitted in the Opinion Letter program, as
described in section 10.02. In this case, the Adopting Employer will lose reliance on the Opinion
Letter as of the effective date of the amendment but the plan will remain eligible for the Cycle
system (provided that the Adopting Employer adopts timely Interim Amendments) until the end
of the Cycle that includes the effective date.
(4) An Adopting Employer of a Nonstandardized Plan makes amendments that, due to the nature
and extent of the amendments, result in the IRS, in its sole discretion, determining that the plan
should be treated as individually designed. In this case, the Adopting Employer generally will
lose reliance on the Opinion Letter as of the effective date of the amendments but the plan will
remain eligible for the Cycle system (provided that the Adopting Employer adopts timely Interim
Amendments) until the end of the Cycle that includes the effective date.
(5) An Adopting Employer chooses to discontinue participation in a Pre-approved Plan that has
been amended by the Provider without substituting another Pre-approved Plan. In this case, the
Adopting Employer will lose reliance on the Opinion Letter as of the date participation in the
Pre-approved Plan ends but the plan will remain eligible for the Cycle system (provided that the
Adopting Employer adopts timely Interim Amendments) until the end of the Cycle that includes
the date on which participation in the Pre-approved Plan ends.
(6) An Adopting Employer makes an amendment to a Pre-approved Plan that removes any of the
required provisions of section 9. In this case, the Adopting Employer will lose reliance on the
Opinion Letter as of the effective date of the amendment, but the plan will remain eligible for the
Cycle system (provided that the Adopting Employer adopts timely Interim Amendments) until the
end of the Cycle that includes the effective date.
(7) As set forth in section 11.02, if, during the Employer Adoption Window for a Cycle, an Adopting
Employer adopts a plan other than either a newly approved version of the same plan or a newly
21
Adopting Employers who are considering making an amendment that is not extensive to a Standardized Plan might consider adopting a Nonstandardized Plan instead, in order to be able
to apply for determination letter using Form 5307, Application for Determination for Adopters of Modified Nonstandardized Pre-approved Plans, as a Pre-approved Plan. See section 25.

December 18, 2023 1526 Bulletin No. 2023–51
approved version of a different Pre-approved Plan, the plan will continue to be subject to the
Remedial Amendment Period rules applicable to Pre-approved plans until the end of the Employer
Adoption Window for that Cycle; however, for purposes other than the Remedial Amendment
Period, at the time the plan that is not a newly approved Pre-approved Plan is adopted, the plan
will be treated as an individually designed plan. In contrast, if, by the end of any Employer
Adoption Window, an Adopting Employer fails to adopt a newly approved version of the same
plan or a newly approved version of a different Pre-approved Plan, and does not adopt another
plan to replace its Pre-approved plan, the plan will be treated as an individually designed plan at
the end of that Employer Adoption Window.
(8) As set forth in section 6.04, if an Interim Amendment is not adopted by the time period set
forth in section 7 and the Adopting Employer does not correct this failure to timely adopt the
Interim Amendment within two years after the time period set forth in section 7, then the Adopting
Employer’s plan will be treated as an individually designed plan at the end of that two-year period.
SECTION 14. OPINION LETTER APPLICATIONS - INSTRUCTIONS TO PROVIDERS AND OTHER RULES FOR
APPLICATIONS AND LETTERS
.01 Issuance of an Opinion Letter. The IRS will, upon an application of a Provider, issue an Opinion
Letter confirming that the form of the Provider’s plan satisfies the Qualification Requirements or
Section 403(b) Requirements, as applicable.
.02 Cycle 4 Submission Period for defined contribution Qualified Pre-approved Plans. Pursuant to
this revenue procedure, the Submission Period for a Provider of a defined contribution Qualified
Pre-approved Plan to submit an application for a Cycle 4 Opinion Letter begins on February 1,
2024, and ends on January 31, 2025. A Provider may still apply for a Cycle 4 Opinion Letter after
the Submission Period. See section 16 regarding filing after the Submission Period.
.03 Procedure for applying for an Opinion Letter. The Provider must submit an application for
an Opinion Letter with respect to its plan on the version of Form 4461, Application for Approval
of Standardized or Nonstandardized Pre-approved Defined Contribution Plans, Form 4461-A,
Application for Approval of Standardized or Nonstandardized Pre-approved Defined Benefit Plan,
Form 4461-B, Application for Approval of Standardized or Nonstandardized Pre-approved Plans
(Mass Submitter Adopting Provider), or Form 4461-C, Application for Approval of Standardized
or Nonstandardized 403(b) Pre-approved Plans, as appropriate, that is applicable at the time
of the request. The request must be accompanied by (1) the applicable required user fee that
will be provided for in the successors to Rev. Proc. 2023-4 (as updated annually), and (2) if an
Opinion Letter had been issued for the plan for the preceding Cycle, a signed certification that
all necessary amendments required by the IRS in order for the form of the plan to satisfy the
Qualification Requirements or Section 403(b) Requirements, as applicable, have been made and
communicated to all Adopting Employers. All information on the application form must be typed.
The application form must be sent to the address listed in section 24. The application must include
a copy of the plan document and any adoption agreement, if applicable. If an Opinion Letter
had been issued for the plan for the preceding Cycle, the Provider must submit a restated plan
that incorporates any amendments. Copies of Trust or Custodial Account Documents, Investment
Arrangements, or other funding media should not be submitted, as the IRS will not review for
(and the Opinion Letter will not cover) any provisions included in Trust or Custodial Account
Documents, Investment Arrangements, or other funding media. Additionally, the IRS requests that
applications be submitted by thumb or flash drive instead of being submitted as paper files, and
that the documents be saved in Microsoft Word or Adobe Acrobat PDF format. The IRS strongly
encourages Providers to take advantage of this electronic submission format. If a plan received an
Opinion Letter for the preceding Cycle, the IRS strongly encourages Providers to submit a redline

Bulletin No. 2023–51 1527 December 18, 2023
of the plan highlighting the changes made. To pay a user fee, a Provider must continue to submit
a paper check and a paper Form 8717-A, User Fee for Employee Plan Opinion Letter Request.
.04 Additional submission requirements for Interim Amendments. If the plan has received an
Opinion Letter for the preceding Cycle, in addition to the application described in section 14.03,
the Provider must submit a certification that all Interim Amendments related to changes in law
listed on the applicable Cumulative List have been made and a cover letter summarizing how the
provisions of the plan are affected by each amendment. The IRS retains the right to request and
secure from the Provider in appropriate circumstances copies of all Interim Amendments related
to changes in law listed on the applicable Cumulative List that the Provider has adopted on behalf
of its Adopting Employers.
.05 Expediting review of substantially identical plans. The IRS reserves the right to review
applications in any order that will expedite the processing of Opinion Letter applications,
subject to section 16 regarding filings made after the Submission Period. To expedite the review
of substantially identical plans that are not a Mass Submitter’s plans, the IRS encourages plan
drafters and Providers to include with each Opinion Letter application, if appropriate, a cover
letter setting forth the following information:
(1) The name and file folder number (if available) of the plan that, for review purposes, the plan
drafter designates as the “lead plan” (including the name and EIN of the Provider);
(2) A list of all plans written by the plan drafter that are substantially identical to the lead plan
(including the information described in paragraph (1) of this section 14.05 for each plan);
(3) A description of each location in the plan for which the application is being submitted that
is not word-for-word identical to the language of the lead plan, including an explanation of the
purpose and effect of each such difference; and
(4) A certification made under penalties of perjury by the plan drafter that the information described
in paragraph (3) of this section 14.05 is true and complete.
If the Provider or plan drafter is aware that a lead plan or any substantially identical plan has been
assigned for review to a specialist, the cover letter also should indicate the name of the specialist,
if possible. To the extent feasible, lead plans and substantially identical plans should be submitted
together. The IRS will regard the information and certification described in paragraphs (3) and
(4) of this section 14.05 as a representation of a material fact for purposes of issuing an Opinion
Letter.
.06 Adoption Agreement Plans - number of basic plan documents, adoption agreements, and
applications required.
(1) Qualified Pre-approved Plans: use of basic plan document by multiple Adoption Agreement
Plans.
(a) In general, provided that the provisions of a basic plan document are identical for all plans using
that document, separate defined contribution Qualified Pre-approved Plan adoption agreements
may be associated with the same defined contribution Qualified Pre-approved Plan basic plan
document, and separate defined benefit Qualified Pre-approved Plan adoption agreements may be
associated with the same defined benefit Qualified Pre-approved Plan basic plan document. Thus,
for example, a profit-sharing plan, a money purchase pension plan other than a target benefit plan,
a target benefit plan, and an ESOP may all use the same defined contribution basic plan document.
Adoption agreements of defined benefit plans, defined contribution plans, and § 403(b) plans may
not be associated with the same basic plan document.
(b) Basic plan documents and associated adoption agreements used for Governmental Plans must
be separate from the basic plan documents and associated adoption agreements used for plans that

December 18, 2023 1528 Bulletin No. 2023–51
are not Governmental Plans. In addition, the basic plan document and the adoption agreements
associated with a church plan, as described in § 414(e), that has not made an election set forth
in § 410(d) may not be combined with the basic plan document and the adoption agreements of
any other type of plan. Thus, for example, a Provider that wishes to obtain Opinion Letters for a
Governmental Plan and a non-electing church plan must submit a separate basic plan document
and associated adoption agreement for the Governmental Plan and a separate basic plan document
and associated adoption agreement for the non-electing church plan.
(2) Section 403(b) Pre-approved Plans: use of basic plan documents by multiple Adoption
Agreement Plans.
(a) Separate Section 403(b) Pre-approved Plan adoption agreements may be associated with the
same Section 403(b) Pre-approved Plan basic plan document. Adoption agreements of defined
benefit plans, defined contribution plans, and § 403(b) plans may not be associated with the same
basic plan document.
(b) A plan that is intended to be a Retirement Income Account and a plan that is not intended to be
a Retirement Income Account may not be combined in in the same basic plan document.
(3) Number of adoption agreements required.
(a) A Standardized Plan and a Nonstandardized Plan may not be combined in a single adoption
agreement.
(b) The following rules apply for a Qualified Pre-approved Plan:
(i) A profit-sharing plan (with or without a § 401(k) arrangement) that does not include an ESOP
feature and a money purchase pension plan that is not a target benefit plan may use the same
adoption agreement; however, separate adoption agreements are required for ESOPs and target
benefit plans.
(ii) An ESOP is permitted to include both profit-sharing and § 401(k) features in the same adoption
agreement; however, an employer that adopts the plan may not adopt the profit-sharing or § 401(k)
features without also adopting the ESOP portion of the plan.
(iii) An adoption agreement submitted for a defined benefit plan may include any combination
of integrated formulas (that is, formulas that provide for permitted disparity), non-integrated
formulas, and cash balance formulas.
(c) For a Section 403(b) Pre-approved Plan, a single adoption agreement may be drafted to cover
multiple types of Employers (for example, a single adoption agreement may be drafted to cover a
church, a § 501(c)(3) organization, or a public school).
(4) Number of applications required. A separate application form must be filed with respect to each
adoption agreement submitted. A basic plan document and all associated adoption agreements
should be submitted simultaneously. Only one copy of the basic plan document should be
provided. However, if additional adoption agreements are later submitted with respect to a basic
plan document, the Provider must submit a copy of the basic plan document with each submission
and include a cover letter identifying the original submission (including the date submitted). In
that case, the plan number given to the basic plan document must remain the same as in the prior
submission.
.07 Separate applications required for Single Document Plans
(1) With respect to a Standardized Plan and a Nonstandardized Plan, a separate plan and application
must be submitted for each plan if it is a Single Document Plan.

Bulletin No. 2023–51 1529 December 18, 2023
(2) For a Qualified Pre-approved Plan, a separate plan and application must be submitted for each
of the following types of Single Document Plans: a target benefit plan, an ESOP, and a defined
benefit plan. A profit-sharing plan (with or without a § 401(k) arrangement) that does not include
an ESOP and a money purchase pension plan that is not a target benefit plan may be combined in
a single plan and application. In addition, although an ESOP is permitted to include both profit-
sharing and § 401(k) features in the same plan, an Employer that adopts the plan may not select the
profit-sharing or § 401(k) features without also selecting the ESOP provisions in the plan.
(3) For a Qualified Pre-approved Plan, with respect to a Governmental Plan or a non-electing
church plan, a separate plan and application must be submitted for each plan. Thus, for example,
separate plans and application forms must be submitted for a Governmental Plan, a plan that is not
a Governmental Plan, and a non-electing church plan.
(4) For a Section 403(b) Pre-approved Plan, a separate plan and application is required for each
Single Document Plan. A Single Document Plan may accommodate usage by more than one type
of Employer; however, a Retirement Income Account plan must always be filed as a separate
Single Document Plan.
.08 Sample Language. Before the Submission Period with respect to a Cycle begins, the IRS
anticipates providing updated Listings of Required Modifications (LRMs) including sample plan
language. Although the sample language is designed for use in plans that use an adoption agreement
format, in order to expedite processing, Providers should refer to the sample language as a guide
in drafting Single Document Plans. Specifically, to expedite the review of their plans, Providers
are encouraged to use LRM language if appropriate. The updated LRMs, when available, may be
downloaded at https://www.irs.gov/Retirement-Plans/Listing-of-Required-Modifications-LRMs.
.09 Operational Compliance List. The Remedial Amendment Period permits a plan to be
amended retroactively to comply with a change in Qualification Requirements or Section
403(b) Requirements, as applicable; however, a plan must be operated in compliance with those
requirements beginning on the effective date of the change. To assist Adopting Employers in
achieving operational compliance, the IRS provides annually an Operational Compliance List
at https://www.irs.gov/retirement-plans/operational-compliance-list to identify changes in
those requirements that are effective during a calendar year. To comply with the Qualification
Requirements or Section 403(b) Requirements, as applicable, however, a plan must comply
operationally with each relevant requirement, even if the requirement is not included on an
Operational Compliance List. Providers may wish to consult the Operational Compliance List
when drafting Interim Amendments.
.10 Material furnished to Adopting Employers. A Provider must furnish each Adopting Employer
with a copy of the approved Pre-approved Plan, copies of any subsequent amendments, and the
most recently issued Opinion Letter for the plan from the IRS.
.11 Effect of failure to disclose a material fact, misrepresentation of a material fact, or to
accurately provide information. A Provider’s (1) failure to disclose to the IRS a material fact,
(2) misrepresentation of a material fact in the application, or (3) failure to accurately provide any
of the information called for on any form required by this revenue procedure may result in the
inability of Adopting Employers to rely on the Opinion Letter (for example, if the IRS revokes an
Opinion Letter due to the Provider’s failure to disclose to the IRS a material fact, the Adopting
Employer would lose reliance on the Opinion Letter). See section 12.03(7) regarding limitations
on reliance. The Provider may be required by the IRS to immediately notify each Adopting
Employer of any of its Pre-approved Plans affected by the failure if the Adopting Employer’s
reliance on the Opinion Letter is affected or if the failure could result in adverse tax consequences
for the Adopting Employer.
.12 Additional information may be requested. When reviewing the application for an Opinion
Letter, the IRS may, in its discretion, require any additional information that it deems necessary,
including a demonstration and/or explanation of how the variables (options or alternatives) in

December 18, 2023 1530 Bulletin No. 2023–51
the Pre-approved Plan interrelate to satisfy the Qualification Requirements or Section 403(b)
Requirements, as applicable. If a letter requesting changes to the Pre-approved Plan is sent to
the Provider or an authorized representative, changes responsive to the letter must be received
no later than 30 days from the date of the letter, and the response must include either a copy of
the plan with the changes highlighted or, if the changes are not extensive, replacement pages. If
the changes are not received within 30 days, the application may be considered withdrawn. An
extension of the 30-day time limit will only be granted for good cause.
.13 Inadequate submissions. The IRS will return, without further action or refunding of the user
fee, plans that are not in substantial compliance with the Qualification Requirements or Section
403(b) Requirements, as applicable, or plans that are so deficient that they cannot be reviewed
in a reasonable period of time. A plan may be considered not to be in substantial compliance if,
for example, it omits language needed to comply with a Qualification Requirement or Section
403(b) Requirement, as applicable, or merely incorporates those requirements by reference to the
applicable Code section. The IRS will not consider a plan with such an omission or cross-reference
until after the plan has been revised and resubmitted, and the modified plan will be treated as a
new application for approval as of the date it is resubmitted, and therefore will be treated as filed
after the Submission Period, as set forth in section 16, if resubmitted after the Submission Period.
No additional user fee will be charged if an inadequate submission is amended to be in substantial
compliance and is resubmitted to the IRS within 30 days following the date the Provider is notified
of the inadequacy.
.14 Nonidentification of questionable issues may cause delay. If a plan submitted as part of an
Opinion Letter application includes a provision that gives rise to an issue for which contrary
published authorities exist, failure to disclose to the IRS and address any significant contrary
authorities may result in requests for additional information, which will delay action on the
application. See section 14.12.
.15 No Opinion Letter for later plan amendments. The IRS will not issue an Opinion Letter with
respect to amendments made between applicable Submission Periods, and the Provider should
not submit an application between applicable Submission Periods for an Opinion Letter with
respect to plan amendments. Instead, the Provider must submit a restated plan that incorporates
the amendments during the next Submission Period.
SECTION 15. ADDITIONAL REQUIREMENTS FOR MASS SUBMITTERS
.01 Opinion Letters issued to Mass Submitters.
(1) The IRS will, upon request by a Mass Submitter, issue an Opinion Letter confirming that the
form of the Mass Submitter’s plan satisfies the Qualification Requirements or Section 403(b)
Requirements, as applicable. See section 14 for the instructions for Opinion Letter applications.
In the case of a submission of a Pre-approved Plan under this revenue procedure, the Mass
Submitter’s application also must be accompanied by applications for an Opinion Letter filed on
behalf of 15 unaffiliated Providers, as described in section 4.01(10), that are offering the same
plan for that Cycle on a word-for-word identical basis as set forth in section 15.02, unless the
Mass Submitter has already satisfied this requirement in connection with a previous application
under this revenue procedure involving another Pre-approved Plan pursuant to section 15.01(2).
Any plan submitted by a Mass Submitter must include language designating the Mass Submitter
as agent for the Provider of the plan for purposes of making plan amendments.
(2) After satisfying the 15-unaffiliated-Providers requirement as to the number of adopting
Providers, the Mass Submitter may submit additional applications on behalf of other Providers
that wish to adopt a plan that is word-for-word identical to the Mass Submitter’s plan (as an

Bulletin No. 2023–51 1531 December 18, 2023
identical adopter) or a plan that includes Minor Modifications to the Mass Submitter’s plan (as
a minor modifier adopter). In addition, after satisfying the 15-unaffiliated-Provider requirement
for one plan of the Mass Submitter, the Mass Submitter may submit applications for an Opinion
Letter under this section 15.01 for its other plans, regardless of the number of identical adopters
of the other plans.
.02 Reduced procedural requirements for Providers that use Mass Submitter plans. A Provider
that uses a Mass Submitter’s plan must obtain an Opinion Letter. In addition to the applicable
requirements in section 14, the Mass Submitter must submit on behalf of each Provider a completed
application form that includes a declaration by the Mass Submitter under penalty of perjury that
the Provider will offer a plan that is word-for-word identical to a plan of the Mass Submitter or a
plan that includes Minor Modifications to the Mass Submitter’s plan. If the Provider is offering
a plan that is word-for-word identical (including a Flexible Plan), a copy of the plan need not be
submitted. If the Mass Submitter submits a plan with Minor Modifications, it must comply with the
requirements of section 15.03(2). The application must be accompanied by the required user fee
as provided in the successors to Rev. Proc. 2023-4 (as updated annually) and a signed certification
that all necessary amendments required by the IRS in order for the form of the Provider’s plan
to satisfy the Qualification Requirements or Section 403(b) Requirements, as applicable, have
been made and communicated to all Adopting Employers. Upon receipt of the application for an
Opinion Letter, the IRS will, as soon as administratively feasible, issue an Opinion Letter with
respect to the Provider’s plan (provided that an Opinion Letter has been issued with respect to the
Mass Submitter’s plan).
.03 Flexible Plans and Minor Modifications.
(1) Flexible Plan.
(a) In general. A Provider that adopts a Mass Submitter’s Flexible Plan may include or delete
any optional provision that is designated as an optional provision in the Mass Submitter’s
plan, provided the inclusion or deletion of specific optional provisions conforms to the Mass
Submitter’s written representation to the IRS concerning the choices available to a Provider and
the coordination of optional provisions. A Mass Submitter must bracket and identify the optional
provisions when submitting the plan to the IRS and provide the IRS a written representation
describing the choices available to Providers and the coordination of optional provisions. Thus,
the representation must indicate whether a Provider’s plan may include only one of a certain group
of optional provisions, may include only a specific combination of provisions, or may exclude
the provisions entirely. Similarly, if the inclusion (or deletion) of a specific optional provision
in a Provider’s plan will automatically result in the inclusion (or deletion) of any other optional
provision, this relationship must be set forth in the Mass Submitter’s representation. A Flexible
Plan may include only optional provisions that meet the requirements of section 15.03(1)(b), and
must be drafted so that the form of any Provider’s plan satisfies the Qualification Requirements
or Section 403(b) Requirements, as applicable, notwithstanding the inclusion or deletion of
optional provisions. For example, if a Provider’s defined contribution Qualified Pre-approved
Plan includes an optional provision that permits a portion of a participant’s account to be invested
in life insurance, then, under the terms of the Provider’s plan, the application of the proceeds of
the life insurance must meet the requirements of §§ 401(a)(11) and 417. A Flexible Plan adopted
by a Provider that differs from the Mass Submitter’s plan only because the Provider has deleted
certain optional provisions from its plan in conformance with the Mass Submitter’s representation
described in this section 15.03(1)(a) is treated as a plan that is word-for-word identical to the Mass
Submitter’s plan. The IRS encourages Mass Submitters to limit the number of optional provisions
described in section 15.03(1)(b)(i) and (ii) that Mass Submitters provide under a Flexible Plan to
six investment provisions and six administrative provisions.
(b) Optional provisions. A Flexible Plan may include optional provisions that comply with the
requirements set forth in this section 15.03(1)(b). The optional provisions may be arranged as
separate optional articles or sections within a Pre-approved Plan or as separate optional provisions
within a single article or section. A Flexible Plan also may include related optional provisions in

December 18, 2023 1532 Bulletin No. 2023–51
the adoption agreement. For example, if a plan document for a Mass Submitter’s Flexible Plan
includes an optional provision that would permit loans under a Provider’s plan, the adoption
agreement may also include an optional provision that would enable an Adopting Employer to
elect whether loans are available under the plan it adopts. If the Provider does not wish to enable
Adopting Employers to make loans available under their plans, the Provider would need to delete
from the Provider’s plan the optional provision in both the plan document and the adoption
agreement. A Provider may include or delete optional provisions of a Mass Submitter’s plan,
but once the Provider has decided to include an optional provision, it must offer that provision
to all Adopting Employers. Any optional provision that the IRS determines does not meet the
requirements of this section 15.03(1)(b) must be changed to a non-optional provision or deleted
from the Mass Submitter’s plan. The following is an exclusive list of the permissible optional
provisions that a Flexible Plan may include:
(i) Investment provisions. A Mass Submitter may offer a variety of investment provisions in its
plan for a Provider to include or delete from the Provider’s version of the plan. However, the
plan adopted by the Provider must provide some method for investing trust assets. Investment
provisions are those provisions that describe the plan’s methods of investing assets, including
provisions such as the availability of loans and investments in insurance contracts or other funding
media, and self-directed investments.
(ii) Administrative provisions. A Mass Submitter may offer a variety of administrative provisions
in its plan for a Provider to include or delete from the Provider’s version of the plan. However,
the plan adopted by the Provider must describe how the plan is administered. Administrative
provisions are those provisions that describe the administration of the plan, including the powers,
duties, and responsibilities of a plan’s custodian, trustee, administrator, Adopting Employer, and
other fiduciaries, as applicable. Pursuant to section 9.06(14), every Section 403(b) Pre-approved
Plan must provide for an appendix to identify the parties responsible for the various administrative
functions under the plan. Optional administrative provisions that a Provider may include in or
delete from the plan include the allocation of responsibilities among fiduciaries (if applicable), the
resignation or replacement of fiduciaries, the claims procedures under the plan, and the record-
keeping requirements under the plan. However, procedural provisions that are required for the
form of the plan to satisfy the Qualification Requirements or Section 403(b) Requirements, as
applicable, are not administrative provisions under this section 15. For example, an administrative
provision does not include a provision regarding the notice to participants required by § 417 and
record-keeping required by regulations under § 401(k) and/or 401(m).
(iii) Cash or Deferred Arrangement. A Mass Submitter of a defined contribution qualified plan
may include a self-contained cash or deferred arrangement (as defined in § 401(k)) for Providers
to include or delete.
(2) Minor Modifications.
(a) A plan that includes Minor Modifications to the Mass Submitter’s plan must be submitted by
the Mass Submitter on behalf of the Provider that will adopt the modified plan. Subject to sections
15.05 and 16 and the provisions of this section 15.03(2)(a), submissions with respect to Minor
Modifications will be reviewed on an expedited basis, and Opinion Letters will be issued to the
Provider as soon as possible (which might be after the issuance of an Opinion Letter to other
Providers (see section 17)).
(b) The IRS reserves the right to determine if the plan’s changes are Minor Modifications (that
is, if the changes are not numerous and do not require an in-depth technical review). If the IRS
determines that the changes are not minor, the plan submitted under section 15.03(2)(c) is not
entitled to expedited review and will otherwise be treated as a non-Mass Submitter plan. In the
event the plan is treated as a non-Mass Submitter plan, the IRS will notify the Mass Submitter
in writing of its determination. Within 30 calendar days following the date that the notification is
provided, either the Mass Submitter may revise the plan so that the modifications are minor and
resubmit the revised plan, or the Provider may submit Form 4461, 4461-A, or 4461-C, whichever

Bulletin No. 2023–51 1533 December 18, 2023
is applicable, and an additional user fee in an amount equal to the difference between a non-Mass
Submitter plan application user fee and a minor modifier adopter plan application user fee. If, after
the 30-day period, neither action has been taken, the IRS may treat the application as having been
withdrawn.
(c) During the Submission Period, the Mass Submitter must initially submit the first page of the
application as a placeholder with respect to each Provider that will offer a plan that includes Minor
Modifications to the Mass Submitter’s plan. After the IRS sends a notification to the applicable
Mass Submitter with respect to the lead plan indicating that the IRS has determined that the form
of the plan appears to be in full compliance with the applicable Qualification Requirements or
Section 403(b) Requirements, as applicable, the Mass Submitter will have 21 days to submit a
copy of the Mass Submitter’s plan with the Provider’s modifications highlighted, as well as a
statement indicating the location and effect of each change. The Mass Submitter must certify
under penalties of perjury that the plan of the Provider, except for the delineated changes, is word-
for-word identical to the plan for which the Mass Submitter will be receiving or has received
an Opinion Letter. If a Mass Submitter fails to identify a material modification, the failure is
considered a material misrepresentation, and an Adopting Employer may not rely on the Opinion
Letter that may be issued with respect to the plan for the modification or any other provision of
the plan that may be affected by the modification. See section 12.03(8) regarding limitations on
reliance. The Mass Submitter must also immediately notify any affected minor modifier adopter
of the failure, and the minor modifier adopter must notify all Adopting Employers of any of its
Pre-approved Plans affected by the failure, including an explanation of the effect of the failure
on the reliance by Adopting Employers on the Opinion Letter. If a Mass Submitter repeatedly
fails to identify the modifications, the IRS may deny permission to that Mass Submitter to submit
additional modifications.
.04 Amendments of Mass Submitter plans. If a Mass Submitter amends any of its plans, the Mass
Submitter must provide copies of the amendment to Providers that have adopted the plan. Any
Provider that does not wish to make the amendments made by a Mass Submitter may switch to
another Mass Submitter or may submit an application for an Opinion Letter on its own behalf
during the next applicable Submission Period. The IRS will not issue an Opinion Letter with
respect to amendments made between applicable Submission Periods, and a Mass Submitter
should not submit an application between applicable Submission Periods for an Opinion Letter
with respect to plan amendments. Instead, the Mass Submitter must submit a restated plan,
including the amendments, during the next Cycle.
.05 Expeditious processing accorded Mass Submitter plans. Subject to section 16, all Mass
Submitters’ plans, including approved plans of a Mass Submitter adopted by Providers, will be
accorded more expeditious processing than plans submitted by non-Mass Submitters, to the extent
administratively feasible.
SECTION 16. FILINGS MADE AFTER THE SUBMISSION PERIOD
.01 In general. Except as set forth in section 16.02, for an application for an Opinion Letter
(including that of a minor modifier adopter of a Mass’s Submitter plan) that is submitted after
the applicable Submission Period for a Cycle but before the beginning of the Employer Adoption
Window for that Cycle, the IRS generally will not review the application until it has reviewed
and processed all applications submitted during that Cycle’s Submission Period. However, the
IRS may, in its discretion, determine whether the processing of filings made after the Submission
Period may be prioritized and accelerated. The IRS will not accept applications for a Cycle that
are submitted during or after that Cycle’s Employer Adoption Window.

December 18, 2023 1534 Bulletin No. 2023–51
.02 Exception for identical adopter. An application for an Opinion Letter for a plan that is
word-for-word identical to a Mass Submitter Pre-approved Plan is not treated as made after the
Submission Period merely because it is submitted after the end of the applicable Submission
Period for a Cycle. Applications for a plan that is word-for-word identical to a Mass Submitter’s
Pre-approved Plan for a Cycle may be submitted until the IRS informs the Mass Submitter that
word-for-word identical applications will no longer be accepted, which is expected to be shortly
before the issuance of Opinion Letters for the next Cycle.
SECTION 17. SCOPE OF REVIEW; TIMING OF ISSUANCE OF OPINION LETTERS
.01 Scope of review.
(1) In general. The IRS will review plans submitted during the Submission Period for a Cycle
(as well as later identical adopter applications and applications that are filed after the Submission
Period that the IRS will review in accordance with section 16) taking into account the applicable
Cumulative List for the Cycle, as described in section 17.01(2). Generally, the IRS will consider
only the items on the applicable Cumulative List for the Cycle in determining whether to issue
an Opinion Letter for that Cycle. However, if a plan that has not been previously reviewed is
submitted for a Cycle or a plan has been amended with respect to previously approved language,
the IRS will also review the plan for items on earlier Cumulative Lists, as well as for any other
relevant Qualification Requirements or Section 403(b) Requirements, as applicable, that were
considered by the IRS in issuing Opinion Letters prior to the implementation of Cumulative Lists.
(2) Cumulative List. For each Cycle, the IRS intends to publish a Cumulative List in the IRB
shortly before the start of the Cycle’s Submission Period. The Cumulative List for a Cycle sets
forth specific items the IRS has identified for review in determining whether the form of a Pre-
approved Plan that has been submitted to the IRS for an Opinion Letter has been properly updated
after the plan was submitted for an Opinion Letter for the preceding Cycle.
.02 Timing of issuance of Opinion Letters. The IRS intends to issue Opinion Letters for a Cycle to
Mass Submitters and Providers at approximately the same time within the Cycle for applications
submitted during the Cycle’s Submission Period (other than an application for a plan that includes
Minor Modifications to a Mass Submitter plan). Prior to issuing Opinion Letters for a Cycle, the
IRS will send a notification to the applicable Mass Submitter or Provider if the IRS determines
that the plan appears to be in full compliance with the applicable Qualification Requirements or
Section 403(b) Requirements, as applicable, based on the submission and the review as of the
date of notification. However, this notification will only indicate that the plan appears to meet the
applicable requirements under review as of the date of the notification. This notification is for the
convenience of the applicable Mass Submitter or Provider concerning the status of its application
and does not constitute an official Opinion Letter on which the Mass Submitter or Provider may
rely. In addition, the IRS reserves the right to require changes after the notification is sent.
SECTION 18. WITHDRAWAL OF APPLICATIONS
.01 Notification and effect. A Provider may withdraw its application for an Opinion Letter at any
time prior to the issuance of an Opinion Letter by notifying the IRS in writing of the withdrawal at
the address set forth in section 24. The Provider also must notify each Adopting Employer of the
withdrawal of the application and the consequences of the withdrawal to the Adopting Employer.
As set forth in section 11, the plan of such an Employer will become an individually designed plan

Bulletin No. 2023–51 1535 December 18, 2023
unless the Employer adopts a newly approved Pre-approved Plan during the Employer Adoption
Window for the Cycle for which the application was submitted.
.02 IRS retains information. Even though an application is withdrawn, the IRS will retain all
correspondence and documents associated with that application and will not return them to
the Provider. If an application is withdrawn, the case may be referred to IRS Employee Plans
Examinations.
SECTION 19. NONTRANSFERABILITY OF OPINION LETTER
An Opinion Letter issued to a Provider is not transferable. In the case of a change in entity with
respect to a Provider, an Opinion Letter issued to the Provider may not be utilized by the changed
entity. In addition, if a different entity assumes sponsorship of a Pre-approved Plan, it must
submit an application for a new Opinion Letter under the name of the different entity and meet
all the applicable requirements to be a Provider. The application may be filed at the time of the
assumption of plan sponsorship by the new Provider, and the filing is not limited to the applicable
Submission Period. The application is subject to a reduced user fee as provided in the successors
to Rev. Proc. 2023-4 (as updated annually). The new Opinion Letter will recognize the change
in sponsorship and will not modify the scope of or change the reliance on the original Opinion
Letter. The IRS may, in appropriate circumstances, request documentation of the assumption of
sponsorship prior to issuing an Opinion Letter to the new entity. Examples of a change in entity
include, but are not limited to, the acquisition of a Provider by another entity, the sale or transfer
of the stock or assets of the Provider to another entity, and any other circumstance that results in a
change in a Provider’s employer identification number.
SECTION 20. NOTIFICATION OF ADOPTING EMPLOYER REGARDING FAILURE OF THE FORM OF THE PLAN TO
SATISFY QUALIFICATION REQUIREMENTS OR SECTION 403(b) REQUIREMENTS
If a Provider has knowledge that the form of an Adopting Employer’s plan may no longer satisfy
the Qualification Requirements or Section 403(b) Requirements, as applicable, and the Provider
does not submit a request to correct the failure to satisfy those requirements under EPCRS,
the Provider must notify the Adopting Employer that the plan may no longer satisfy those
requirements, advise the Adopting Employer that adverse tax consequences may result from the
failure of the form of the plan to satisfy those requirements, and inform the Adopting Employer
about the availability of EPCRS. This section 20 does not impose a requirement on a Provider
to monitor compliance of an Adopting Employer’s plan with the Qualification Requirements or
Section 403(b) Requirements, as applicable, but it provides that the Provider has a duty to inform
the Adopting Employer if the Provider has knowledge that the Adopting Employer’s plan may no
longer satisfy those requirements.
SECTION 21. DISCONTINUED PLANS
.01 Notification to the IRS. A Provider must notify the IRS in writing if a Pre-approved Plan is
no longer in use by any Adopting Employer or the Provider intends to discontinue the plan. The

December 18, 2023 1536 Bulletin No. 2023–51
written notification must be sent to the address set forth in section 24 and must refer to the file
folder number appearing on the latest Opinion Letter issued.
.02 Notification to Adopting Employers. A Provider that intends to discontinue sponsorship of
a Pre-approved Plan that has one or more Adopting Employers must inform each Adopting
Employer of the date on which the Provider will discontinue sponsorship and that the Adopting
Employer’s plan will cease to be a Pre-approved Plan and will convert to an individually designed
plan on that date. The Provider must also inform each Adopting Employer that, notwithstanding
the Provider’s discontinuance of its sponsorship, if, by the end of the calendar year following the
calendar year in which the Provider discontinues sponsorship of the plan, the Adopting Employer
adopts another Pre-approved Plan and the effective date of the adoption is made retroactive to the
date of the discontinued sponsorship, then the Adopting Employer’s plan will be treated as though
it had not ceased to be a Pre-approved Plan.
SECTION 22. REVOCATION OF OPINION LETTER BY THE IRS
An Opinion Letter found to be in error or not in accord with the current procedures of the IRS or the
IRS’s current interpretation of applicable law may be revoked. See also sections 4.01(15), 13.01,
and 23.01 for other circumstances under which an Opinion Letter may be revoked. Revocation
may be applied retroactively. For this purpose, an Opinion Letter is given the same effect as
a determination letter. See generally section 23 of Rev. Proc. 2023-4 (as updated annually).
Revocation may be effected by a notice to the Provider to which the Opinion Letter was originally
issued. The Provider must then notify each Adopting Employer of the revocation as soon as
possible. The notification to each Adopting Employer must explain how the revocation affects
any reliance an Adopting Employer has on the applicable Opinion Letter and on any determination
letter issued.
SECTION 23. RECORD KEEPING REQUIREMENTS
.01 Filing of Opinion Letter application constitutes agreement to comply with record keeping
requirements. By submitting an application for an Opinion Letter under this revenue procedure (or
by having an application filed on its behalf by a Mass Submitter), a Provider agrees, as set forth
in section 4.01(15), to comply with the requirements imposed on the Provider by this revenue
procedure, including the record keeping requirements of this section 23. Failure to comply with
the requirements imposed on the Provider by this revenue procedure may result in the loss of
eligibility to be a Provider and the revocation of Opinion Letters that have been issued to the
Provider.
.02 Maintenance and availability of records of Adopting Employers. A Provider must maintain,
or have maintained on its behalf, for each of its plans, a record of the names, business addresses,
and taxpayer identification numbers of all Adopting Employers. However, a Provider need not
maintain records with respect to employers that, to the best of the Provider’s knowledge, ceased
to maintain its Pre-approved Plan more than three years earlier. Upon written request, a Provider
must provide to the IRS a list of Adopting Employers that indicates, to the best of the Provider’s
knowledge, which of those employers continue to maintain the plan as a Pre-approved Plan and
which of those employers have ceased to maintain the plan as a Pre-approved Plan within the
preceding three years.

Bulletin No. 2023–51 1537 December 18, 2023
SECTION 24. WHERE TO FILE
.01 Opinion Letters. Applications for Opinion Letters, including applications filed by Mass
Submitters, should be sent to:
Internal Revenue Service
Attn: Pre-Approved Plans Coordinator
Room 6-403, Group 7521
P.O. Box 2508
Cincinnati, OH 45201-2508
.02 Delivery Service. An application shipped by Express Mail or a delivery service should be sent
to the attention of the Pre-Approved Plans Coordinator, to:
Internal Revenue Service
550 Main Street
Room 6-403, Group 7521
Cincinnati, OH 45202
PART IV. PROCEDURES FOR AN ADOPTING EMPLOYER APPLYING FOR A DETERMINATION LETTER
SECTION 25. ADOPTING EMPLOYER APPLYING FOR A DETERMINATION LETTER
.01 In general. To the extent permitted in this section 25, an Adopting Employer may obtain reliance
that the form of the plan satisfies the Qualification Requirements or Section 403(b) Requirements,
as applicable, by applying for a determination letter. Section 25.02 provides the rules for applying
for a determination letter submitted on Form 5307, Application for Determination for Adopters
of Modified Nonstandardized Pre-Approved Plans, for review of a Pre-approved Plan using the
applicable Cumulative List. Section 25.03 provides the rules for applying for a determination
letter submitted on Form 5300, Application for Determination for Employee Benefit Plan, for
review of a Pre-approved Plan using the applicable Cumulative List. Section 25.04 provides the
rules for applying for a determination letter submitted on Form 5300 for review of a plan treated
as an individually designed plan using the Required Amendments List. Section 25.05 provides the
rules for applying for a determination letter for a partial termination.
.02 Form 5307 application: eligibility to file, timing, and scope of review.
(1) Eligibility to file.
(a) In general. Except as set forth in section 25.02(1)(b), the following Adopting Employers may
use a Form 5307 to apply for a determination letter:
(i) An Adopting Employer of a Nonstandardized Plan that makes modifications to the terms of
the plan that are not extensive (amendments are considered extensive if the IRS determines, in its
sole discretion, that the plan of the Adopting Employer is no longer substantially similar to the
Nonstandardized Plan of the Provider (see section 25.03(1)(a)(vi) for treatment of changes that
are extensive and section 25.04(1)(a) for treatment of changes that cause a plan to be treated as
individually designed)); or

December 18, 2023 1538 Bulletin No. 2023–51
(ii) An Adopting Employer of any Pre-approved Plan that amends its plan solely to add language
to satisfy the requirements of § 415 (and § 416, in the case of a Qualified Pre-approved Plan) due
to the required aggregation of plans.
(b) Exceptions. Notwithstanding the provisions of section 25.02(1)(a), determination letter
applications for the following plans must be filed on Form 5300 (if otherwise permitted):
(i) Any determination letter application with respect to a multiple employer Qualified Pre-approved
Plan (instead, see section 25.03 and .04);
(ii) A determination letter application for a Nonstandardized Plan that is a Qualified Pre-approved
Plan, a pension plan, and not a Governmental Plan in which the normal retirement age is lower
than the age 62 safe harbor in § 1.401(a)-1(b)(2), that requests reliance on whether the plan
satisfies § 1.401(a)-1(b)(2) (instead, see section 25.03(1)(a)(ii) or (iv));
(iii) A determination letter application for a Nonstandardized Plan that is a Qualified Pre-approved
Plan, a pension plan, and a Governmental Plan in which the normal retirement age does not
satisfy any of the safe harbors described in § 1.401(a)-1(b)(2)(v) of the proposed regulations,
that requests reliance on whether the plan satisfies § 1.401(a)-1(b)(2) of the proposed regulations
(instead, see section 25.03(1)(a)(iii) or (v)); or
(iv) A determination letter application for a Nonstandardized Plan regarding a partial termination
(instead, see section 25.05).
(c) Prior favorable determination letter. An Adopting Employer eligible to file for a determination
letter submitted on Form 5307 may file on a Form 5307 regardless of whether a prior favorable
determination letter has been issued with respect to the plan.
(d) Copy of Opinion Letter. An Adopting Employer must include a copy of the Opinion Letter for
the Pre-approved Plan. See section 13 of Rev. Proc. 2023-4 (as updated annually).
(2) Timing. An Adopting Employer of a Pre-approved Plan for a Cycle that is eligible to file
for a determination letter submitted on Form 5307 generally must file during the Employer
Adoption Window for the Cycle. However, if the Adopting Employer had not previously
adopted a Pre-approved Plan that had received an Opinion Letter for the preceding Cycle, the
Adopting Employer has until the start of the Employer Adoption Window for the next Cycle
to apply for a determination letter submitted on Form 5307. For example, if an Employer did
not previously adopt a Cycle 2 Pre-approved Plan, adopts a Cycle 3 Nonstandardized Plan,
and makes amendments that are not extensive, the Adopting Employer will not be limited to
the Cycle 3 Adoption Window to file for a Form 5307 determination letter (for example, the
Adopting Employer may have adopted the Cycle 3 Nonstandardized Plan for the first time after
the Cycle 3 Adoption Window). Instead, the Adopting Employer has until the start of the Cycle
4 Employer Adoption Window to file for a Form 5307 determination letter for the Cycle 3 plan.
If the Adopting Employer then adopts a newly approved Cycle 4 Nonstandardized Plan during
the Cycle 4 Employer Adoption Window and makes amendments that are not extensive, the
Employer only has until the end of the Cycle 4 Employer Adoption Window to file for a Form
5307 determination letter for the Cycle 4 plan.
(3) Scope of Review. For a determination letter submitted on a Form 5307, the Adopting Employer’s
plan is reviewed using the Cumulative List that was used to review the underlying Pre-approved
Plan.
.03 Form 5300 application filed by an Adopting Employer for a plan treated as a Pre-approved
Plan: eligibility to file, timing, and scope of review using Cumulative List.
(1) Eligibility to file.

Bulletin No. 2023–51 1539 December 18, 2023
(a) In general. The following Adopting Employers must use a Form 5300 to apply for a
determination letter under this section 25.03:
(i) An Adopting Employer that is the controlling member of a multiple employer Nonstandardized
Plan that is a Qualified Pre-approved Plan and that has made modifications to the terms of the plan
that are not extensive (see section 13.05(4));
(ii) For a Qualified Pre-approved Plan that is a pension plan and not a Governmental Plan with a
normal retirement age that is lower than the age 62 safe harbor in § 1.401(a)-1(b)(2), an Adopting
Employer (or, if the plan is a multiple employer qualified plan, the controlling member) that files
a determination letter request that is limited to a determination as to whether a plan’s normal
retirement age satisfies the requirements of § 1.401(a)-1(b)(2);
(iii) For a Qualified Pre-approved Plan that is a pension plan and a Governmental Plan with a
normal retirement age that does not satisfy any of the safe harbors described in § 1.401(a)-1(b)
(2)(v) of the proposed regulations, an Adopting Employer (or, if the plan is a multiple employer
qualified plan, the controlling member) that files a determination letter request that is limited
to a determination as to whether a plan’s normal retirement age satisfies the requirements of
§ 1.401(a)-1(b)(2) of the proposed regulations;
(iv) For a Nonstandardized Plan that is a Qualified Pre-approved Plan, a pension plan, and not a
Governmental Plan in which the normal retirement age under the plan is lower than the age 62 safe
harbor, an Adopting Employer (or, if the plan is a multiple employer qualified plan, the controlling
member) that files a determination letter request that includes, but is not limited to, whether the
plan satisfies § 1.401(a)-1(b)(2), and that has made additional modifications to the terms of the
plan that are not extensive; or
(v) For a Nonstandardized Plan that is a Qualified Pre-approved Plan, a pension plan, and a
Governmental Plan in which the normal retirement age does not satisfy any of the safe harbors
described in § 1.401(a)-1(b)(2)(v) of the proposed regulations, an Adopting Employer (or, if the
plan is a multiple employer qualified plan, the controlling member) that files a determination
letter request that includes, but is not limited to, whether the plan satisfies § 1.401(a)-1(b)(2) of
the proposed regulations, and that has made additional modifications to the terms of the plan that
are not extensive.
(vi) An Adopting Employer of a Nonstandardized Plan that makes modifications to the terms of
the plan that are extensive (see section 25.02(1)(a)(i) for what changes will be determined to be
extensive and section 13.05(4) for changes that cause a plan to be treated as individually designed
and thus subject to section 25.04(1)(a)).
(b) Prior favorable determination letter. An Adopting Employer eligible to file for a determination letter
submitted on Form 5300 under this section 25.03 may file on a Form 5300 under this section 25.03
regardless of whether a prior favorable determination letter has been issued with respect to the plan.
(c) An Adopting Employer that applies for a determination letter for a Pre-approved Plan for one
or more of the reasons described in section 25.03(1)(a) must identify the applicable reason(s) in a
cover letter to the application and include a copy of the Opinion Letter for the Pre-approved Plan.
(2) Timing. For each Cycle, an Adopting Employer that is eligible to file for a determination
letter submitted on Form 5300 under this section 25.03 generally must file the determination
letter application during the Employer Adoption Window for the Cycle. However, if the Adopting
Employer had not previously adopted a Pre-approved Plan that had received an Opinion Letter for
the preceding Cycle, the Adopting Employer has until the start of the Employer Adoption Window
for the next Cycle to apply for a determination letter submitted on Form 5300 under this section
25.03. For example, if a controlling member of a multiple employer plan did not previously adopt
a Cycle 2 Pre-approved Plan, adopts a Cycle 3 Nonstandardized Plan, and makes amendments that
are not extensive, the Adopting Employer will not be limited to the Cycle 3 Adoption Window to

December 18, 2023 1540 Bulletin No. 2023–51
file for a Form 5300 determination letter (for example, the Employer may have adopted the Cycle 3
Nonstandardized Plan for the first time after the Cycle 3 Adoption Window). Instead, the Adopting
Employer has until the start of the Cycle 4 Employer Adoption Window to file for a Form 5300
determination letter under this section 25.03 for the Cycle 3 plan. If the Adopting Employer then
adopts a newly approved Cycle 4 Nonstandardized Plan during the Cycle 4 Employer Adoption
Window and makes amendments that are not extensive, the Employer only has until the end of
the Cycle 4 Employer Adoption Window to file for a Form 5300 determination letter under this
section 25.03 for the Cycle 4 plan.
(3) Scope of Review. For a determination letter submitted on Form 5300 under this section 25.03,
the Adopting Employer’s plan is reviewed using the Cumulative List that was used to review the
underlying Pre-approved Plan.
.04 Form 5300 application filed by an Adopting Employer for a plan treated as individually
designed: eligibility to file, timing, and scope of review using the Required Amendments List.
(1) Eligibility to file.
(a) In general. An Adopting Employer whose plan is treated as individually designed pursuant to
section 13.05 (for example, if the Adopting Employer makes amendments that, due to the nature
and extent of the amendments, result in the IRS determining that the plan should be treated as
individually designed, as described in section 13.05(4)) must use a Form 5300 to apply for a
determination letter under this section 25.04:
(b) If eligible under Rev. Proc. 2022-40, including the criteria that the plan previously had not been
filed for a determination letter submitted on a Form 5300 and had not been issued a determination
letter as an individually designed plan.
(2) Timing. At any time, to the extent permitted under Rev. Proc. 2022-40.
(3) Scope of Review. In accordance with Rev. Proc. 2022-40, the plan is reviewed based on
the Required Amendments List that was issued during the second calendar year preceding the
submission of the determination letter application.
.05 Form 5300 application for a partial termination. An Adopting Employer of a Qualified Pre-
approved Plan (or, if the plan is a multiple employer plan, the controlling member) that requests
a determination regarding partial termination must file using Form 5300. Applicants may not
request a determination letter with respect to the entire plan unless the plan is otherwise eligible to
be submitted for a determination letter. If the request is limited to whether a partial termination has
occurred, the Employer may file on Form 5300 at any time, regardless of whether the Employer
is otherwise eligible to submit a determination letter application. If the request is not limited to
whether a partial termination has occurred, the Employer must be otherwise eligible to submit a
determination letter application pursuant to Rev. Proc. 2022-40.
.06 Procedures provided in annual revenue procedure. Determination letter filing procedures are
set forth in Rev. Proc. 2023-4, which is updated annually.
PART V. MISCELLANEOUS
SECTION 26. EFFECT ON OTHER DOCUMENTS
.01 Part I and III of Rev. Proc. 2016-37 are clarified, modified, and superseded with respect to a
Cycle 4 (or later) Qualified Pre-approved Plan.

Bulletin No. 2023–51 1541 December 18, 2023
.02 Rev. Proc. 2017-41 is clarified, modified, and superseded with respect to a Cycle 4 (or later)
Qualified Pre-approved Plan.
.03 Sections 4, and 10 through 12 of Rev. Proc. 2019-39 are clarified, modified, and superseded
with respect to a Cycle 3 (or later) Section 403(b) Pre-approved Plan.
.04 Sections 4 through 22 and 25 of Rev. Proc. 2021-37 are clarified, modified, and superseded
with respect to a Cycle 3 (or later) Section 403(b) Pre-approved Plan.
SECTION 27. EFFECTIVE DATE
.01 In general. Except as provided in section 27.02 through .03, this revenue procedure is effective
on November 21, 2023.
.02 Sections 9 through 24 (regarding procedures for applications for Opinion Letters) are effective
with respect to:
(1) A Cycle 4 (or later) defined contribution Qualified Pre-approved Plan;
(2) A Cycle 4 (or later) defined benefit Qualified Pre-approved Plan; and
(3) A Cycle 3 (or later) Section 403(b) Pre-approved Plan.
.03 Section 25 (regarding procedures for applications for a determination letter) is effective with
respect to:
(1) An application for a determination letter submitted by an Adopting Employer with respect to a
Cycle 4 (or later) defined contribution Qualified Pre-approved Plan;
(2) An application for a determination letter submitted by an Adopting Employer with respect to a
Cycle 4 (or later) defined benefit Qualified Pre-approved Plan; and
(3) An application for a determination letter submitted by an Adopting Employer with respect to a
Cycle 2 (or later) Section 403(b) Pre-approved Plan.
22
SECTION 28. PUBLIC COMMENTS
The Department of the Treasury (Treasury Department) and the IRS invite comments on this
revenue procedure. Comments may be submitted electronically via the Federal eRulemaking
Portal at www.regulations.gov (type “Revenue Procedure 2023-37” in the search field on the
Regulations.gov home page to find this revenue procedure and submit comments). Alternatively,
comments may be submitted by mail to:
22
The rules regarding an Adopting Employer’s application for a determination letter apply for Cycle 2 Section 403(b) Pre-approved Plans because, although Cycle 2 has begun, Cycle 2
Opinion Letters have not been issued and the Employer Adoption Window for Cycle 2 (during which an application for a determination letter would generally be submitted) has not begun.

December 18, 2023 1542 Bulletin No. 2023–51
Internal Revenue Service
Attn: CC:PA:LPD:PR (Revenue Procedure 2023-37), Room 5203
P.O. Box 7604
Ben Franklin Station
Washington, D.C. 20044.
The Treasury Department and the IRS will publish for public availability any comment submitted
electronically or on paper to its public docket.
SECTION 29. PAPERWORK REDUCTION ACT
The Paperwork Reduction Act of 1995 (44 U.S.C. 3501–3520) (PRA) requires that a Federal
agency obtain the approval of the Office of Management and Budget (OMB) before collecting
information from the public, whether such collection of information is mandatory, voluntary, or
required to obtain or retain a benefit. A Federal agency may not conduct or sponsor, and a person
is not required to respond to, a collection of information unless the collection of information
displays a valid control number.
The collections of information in this revenue procedure are third-party disclosures, recordkeeping,
and reporting requirements listed in sections 6.04, 9.02(8), 9.06(6), 13.01, 14.03, 14.04, 14.05,
15, 23.01 and 23.02. This information is required to enable the Commissioner, Tax Exempt and
Government Entities Division of the IRS, to make determinations in connection with compliance
with the Qualification Requirements or Section 403(b) Requirements. This information will be
used to determine whether a plan is entitled to favorable tax treatment. The likely respondents
are banks, insurance companies, other financial institutions, law, actuarial, and consulting firms,
employee benefit practitioners and employers. Any collection burden associated with this revenue
procedure is accounted for and approved by OMB under OMB control numbers 1545-1674 and
1545-0169.
The reporting requirements mentioned within this revenue procedure are related to the application
process for an opinion letter as detailed in section 14.03. Additional application information is
needed related to: Interim Amendments as detailed in section 14.04; substantially identical plans
as detailed in section 14.05; and Mass Submitter applications as detailed in section 15. These
collection requirements are included within the OMB approval for 1545-0169. This revenue
procedure does not alter these previously approved information collection requirements and does
not create new collection requirements not already approved by OMB.
The third-party disclosure requirements mentioned within this revenue procedure are related to
the notification requirements for Providers to inform the Adopting Employers of plan amendments
(including Interim Amendments) or the discontinuance of the plan as detailed in sections
9.02(8), 9.06(6), and 13.01 (and section 6.04 regarding Interim Amendments). These collection
requirements are included within the OMB approval for 1545-1674. This revenue procedure does
not alter these previously approved information collection requirements and does not create new
collection requirements not already approved by OMB.
The recordkeeping requirements mentioned within this revenue procedure are related to keeping
records of the of the Opinion Letter application as detailed in section 23.01; and amendment
notifications as detailed in sections 9.02(8), 9.06(6), and 13.01. Additionally, Providers must keep
records of the Adopting Employers as detailed in section 23.02. These collection requirements
are included within the OMB approval for 1545-1674. This revenue procedure does not alter
these previously approved information collection requirements and does not create new collection
requirements not already approved by OMB.

Bulletin No. 2023–51 1543 December 18, 2023
Books or records relating to a collection of information must be retained as long as their contents
may become material in the administration of any internal revenue law. Generally, tax returns and
tax return information are confidential, as required by § 6103.
DRAFTING INFORMATION
The principal author of this revenue procedure is Patrick Gutierrez of the Office of Associate
Chief Counsel (Employee Benefits, Exempt Organizations, and Employment Taxes). For further
information regarding this revenue procedure, contact Employee Plans at (513) 975-6319 (not a
toll-free number).

December 18, 2023 1544 Bulletin No. 2023–51
Submission of Information to IRS by Qualified
Manufacturers of Clean Vehicles, Previously-Owned
Clean Vehicles, and Commercial Clean Vehicles
Rev. Proc. 2023-38
SECTION 1. PURPOSE
This revenue procedure updates the
procedures under § 30D(d)(3) of the
Internal Revenue Code (Code)
1
for qual-
ified manufacturers to enter into a writ-
ten agreement with the Internal Revenue
Service (IRS) under which such manu-
facturer agrees to make periodic written
reports to the Secretary providing vehicle
identification numbers (VINs) and other
information regarding vehicles eligible
for a clean vehicle credit. Vehicles eli-
gible for the clean vehicle credit under
§ 30D (§ 30D credit), the qualified
commercial clean vehicles credit under
§ 45W (§ 45W credit), and the previ-
ously-owned clean vehicles credit under
§ 25E (§ 25E credit), generally must be
manufactured by a qualified manufac-
turer as described in § 30D(d)(1)(C) and
(d)(3).
2
See §§ 45W(c)(1) and 25E(c)(1)
(D)(i). This revenue procedure consoli-
dates all the procedural requirements for
qualified manufacturers in one document
for ease of reference, and establishes the
procedures for qualified manufacturers
to submit information regarding vehicles
for upfront review by the Department
of Energy (DOE), to ensure the vehi-
cles are eligible for the § 30D credit for
the calendar year at issue in accordance
with the excluded entities provision of
§ 30D(d)(7). As provided in section 8 of
this revenue procedure, this revenue pro-
cedure supersedes section 4 of Revenue
Procedure 2022-42, 2022-52 I.R.B. 565,
as well as sections 4.02(1), 7.01, and 7.02
of Revenue Procedure 2023-33, 2023-43
I.R.B. 1135.
SECTION 2. BACKGROUND
.01 Section 30D, Clean Vehicle Credit
(1) Section 30D was enacted by
§ 205(a) of the Energy Improvement
and Extension Act of 2008, Division B
of Public Law 110-343, 122 Stat. 3765,
3835 (October 3, 2008), to provide a
credit for purchasing and placing in ser-
vice new qualified plug-in electric drive
motor vehicles. Section 30D has been
amended several times since its enact-
ment, most recently by § 13401 of Public
Law 117-169, 136 Stat. 1818 (August 16,
2022), commonly known as the Inflation
Reduction Act of 2022 (IRA). In general,
the amendments made by § 13401 of the
IRA to § 30D apply to vehicles placed in
service after December 31, 2022, except
as provided in § 13401(k)(2) through (5)
of the IRA.
(2) Section 30D(a) allows a credit
for the taxable year with respect to each
new clean vehicle placed in service by a
taxpayer during the taxable year. Section
30D(b) provides a maximum credit of
$7,500 per vehicle, consisting of $3,750
if certain critical minerals requirements
are met and $3,750 if certain battery
components requirements are met. These
requirements are described in § 30D(e)(1)
and (2), respectively.
(3) Section 30D(d)(1) defines a “new
clean vehicle” as a motor vehicle that sat-
isfies the following eight requirements set
forth in § 30D(d)(1)(A) through (H):
(a) The original use of the motor vehi-
cle must commence with the taxpayer.
(b) The motor vehicle must be acquired
for use or lease by the taxpayer and not
for resale.
(c) The motor vehicle must be made by
a qualified manufacturer.
(d) The motor vehicle must be treated
as a motor vehicle for purposes of title II
of the Clean Air Act.
(e) The motor vehicle must have a
gross vehicle weight rating of less than
14,000 pounds.
(f) The motor vehicle must be propelled
to a significant extent by an electric motor
that draws electricity from a battery that
has a capacity of not less than 7 kilowatt
hours and is capable of being recharged
from an external source of electricity.
(g) The final assembly of the motor
vehicle must occur within North America
(effective August 17, 2022).
(h) The person who sells any vehicle to
the taxpayer must furnish a report to the
taxpayer and to the Secretary, at such time
and in such manner as the Secretary pro-
vides, containing the following items:
(i) The name and taxpayer identifica-
tion number of the taxpayer;
(ii) The VIN, unless, in accordance
with any applicable rules promulgated by
the Secretary of Transportation, the vehi-
cle is not assigned such a number;
(iii) The battery capacity of the vehicle;
(iv) V erification that original use of the
vehicle commences with the taxpayer;
(v) The maximum credit under § 30D
allowable to a taxpayer with respect to
the vehicle (the amount reported is with-
out regard to the § 30D(f)(10) or § 25E(b)
limitations based on modified adjusted
gross income); and
(vi) In the case of a taxpayer who
makes an election to transfer the credit to
an eligible entity under § 30D(g)(1),
3
any
amount described in § 30D(g)(2)(C) that
has been provided to such taxpayer.
(4) Section 30D(d)(3) defines a “qual-
ified manufacturer” as any manufacturer
(within the meaning of the regulations
prescribed by the Administrator of the
Environmental Protection Agency (EPA)
for purposes of the administration of title
II of the Clean Air Act (as defined in 42
U.S.C. 7521, et seq)) that enters into a
written agreement with the Secretary
1
Unless otherwise specified, all “Section” or “§” references are to sections of the Code.
2
Section 30D(d)(6) defines a new clean vehicle to include any new qualified fuel cell motor vehicle (as defined in § 30B(b)(3)) that meets the requirements of § 30D(1)(G) and (H). Section
25E(c) defines a previously-owned clean vehicle to include, in part, a motor vehicle that either (1) meets the requirements of § 30D(d)(1)(C) (regarding qualified manufacturer), or (2) satisfies
the requirements of § 30B(b)(3)(A) and (B) (regarding fuel cell motor vehicles) and has a gross vehicle weight rating of less than 14,000 pounds. Therefore, if a new clean vehicle is a new
qualified fuel cell motor vehicle described in § 30D(d)(6), it does not need to be made by a qualified manufacturer, as otherwise required under § 30D(d)(1)(C). Similarly, if a previous-
ly-owned clean vehicle is a fuel cell motor vehicle described in § 25E(c)(1)(D)(ii), it does not need to be made by a qualified manufacturer, as otherwise required under § 25E(c)(1)(D)(i).
However, any qualified manufacturer that makes fuel cell vehicles must report on such vehicles as described in sections 4.05 and 6 of this revenue procedure. In addition, any manufacturer
of fuel cell vehicles that is not subject to the requirement to be a qualified manufacturer is encouraged to become a qualified manufacturer for purposes of providing the IRS with information
to facilitate tax administration.
3
Amendments to § 30D to allow an election to transfer the credit to an eligible entity are effective for vehicles placed in service after December 31, 2023. The transfer election provisions are
incorporated by reference in § 25E(f) and apply to previously-owned clean vehicles.

Bulletin No. 2023–51 1545 December 18, 2023
under which such manufacturer agrees
to make periodic written reports to the
Secretary (at such times and in such man-
ner as the Secretary may provide) provid-
ing vehicle identification numbers and
such other information related to each
vehicle manufactured by such manufac-
turer as the Secretary may require.
(5) Section 30D(d)(5) defines “final
assembly” as the process by which a man-
ufacturer produces a new clean vehicle at,
or through the use of, a plant, factory, or
other place from which the vehicle is deliv-
ered to a dealer or importer with all com-
ponent parts necessary for the mechanical
operation of the vehicle included with the
vehicle, whether or not the component
parts are permanently installed in or on
the vehicle.
(6) Section 30D(d)(6) provides that
“new clean vehicle” includes any new
qualified fuel cell motor vehicle (as
defined in § 30B(b)(3)) that meets the
requirements under § 30D(d)(1)(G)
and (H).
(7) Section 30D(d)(7) provides that
“new clean vehicle” does not include:
any vehicle placed in service after
December 31, 2024, with respect to
which any of the applicable critical min-
erals contained in the battery of such
vehicle (as described in § 30D(e)(1)(A))
were extracted, processed, or recycled by
a foreign entity of concern (as defined
in 42 U.S.C. 18741(a)(5)), or any vehi-
cle placed in service after December 31,
2023, with respect to which any of the
components contained in the battery of
such vehicle (as described in § 30D(e)(2)
(A)) were manufactured or assembled by
a foreign entity of concern.
(8) Section 13401(k)(3) of the IRA pro-
vides that the critical minerals and the bat-
tery components requirements described
in § 30D(e)(1) and (2) apply to vehicles
placed in service after the date on which
proposed guidance with respect to the crit-
ical minerals and the battery components
requirements is issued by the Secretary.
On April 17, 2023, the Department of
the Treasury (Treasury Department) and
the IRS issued a Notice of Proposed
Rulemaking, 88 F.R. 23370, which con-
stitutes that proposed guidance. Thus, the
critical minerals and battery components
requirements apply to vehicles placed in
service on or after April 18, 2023.
(9) Section 30D(e)(1)(A) provides
that the critical minerals requirement
with respect to the battery from which
the electric motor of a vehicle draws
electricity is satisfied if the percentage of
the value of the applicable critical miner-
als (as defined in § 45X(c)(6)) contained
in such battery that were (i) extracted or
processed in the United States, or in any
country with which the United States
has a free trade agreement in effect, or
(ii) recycled in North America, is equal to
or greater than the applicable percentage
(as certified by the qualified manufacturer,
in such form or manner as prescribed by
the Secretary) (critical minerals require-
ment). The applicable percentage for the
critical minerals requirement is set forth
in § 30D(e)(1)(B)(i) through (v) and var-
ies based on when the vehicle is placed in
service. In the case of a vehicle placed in
service after April 18, 2023, and before
January 1, 2024, the applicable percent-
age is 40 percent. In the case of a vehicle
placed in service during calendar year
2024, 2025, and 2026, the applicable
percentage is 50 percent, 60 percent, and
70 percent, respectively. In the case of a
vehicle placed in service after December
31, 2026, the applicable percentage is 80
percent.
(10) Section 30D(e)(2)(A) provides
that the battery components requirement
with respect to the battery from which
the electric motor of a vehicle draws elec-
tricity is satisfied if the percentage of the
value of the components contained in
such battery that were manufactured or
assembled in North America is equal to or
greater than the applicable percentage (as
certified by the qualified manufacturer, in
such form or manner as prescribed by the
Secretary) (battery components require-
ment). The applicable percentage for the
battery components requirement is set
forth in § 30D(e)(2)(B)(i) through (vi)
and varies based on when the vehicle is
placed in service. In the case of a vehi-
cle placed in service after April 18, 2023,
and before January 1, 2024, the applica-
ble percentage is 50 percent. In the case
of a vehicle placed in service during cal-
endar year 2024 or 2025, the applicable
percentage is 60 percent. In the case of a
vehicle placed in service during calendar
year 2026, 2027, and 2028, the applicable
percentage is 70 percent, 80 percent, and
90 percent, respectively. In the case of a
vehicle placed in service after December
31, 2028, the applicable percentage is 100
percent.
(11) Section 30D(f)(11)(A) provides
that no credit is allowed for a vehicle
with a manufacturer’s suggested retail
price in excess of the applicable limita-
tion. Section 30D(f)(11)(B) provides that
the applicable limitation for each vehicle
classification is as follows: in the case of
a van, a sport utility vehicle, or a pickup
truck, $80,000; and in the case of any
other vehicle, $55,000.
.02 Section 25E, Previously-Owned
Clean Vehicles Credit
(1) Section 13402 of the IRA added
§ 25E to the Code, which is generally
effective for vehicles acquired after
December 31, 2022, and before January
1, 2033. Section 25E(a) provides that in
the case of a qualified buyer who, during
a taxable year, places in service a previ-
ously-owned clean vehicle, an income tax
credit (that is, the § 25E credit) is allowed
for the taxable year equal to the lesser of
(1) $4,000, or (2) the amount equal to 30
percent of the sale price with respect to
such vehicle.
(2) Section 25E(c) defines certain
terms for purposes of the § 25E credit.
Section 25E(c)(1) defines “previous-
ly-owned clean vehicle” as, with respect
to a taxpayer, a motor vehicle that satisfies
the following four requirements set forth
in § 25E(c)(1)(A) through (D):
(a) The model year of the motor vehi-
cle is at least 2 years earlier than the cal-
endar year in which the taxpayer acquires
such vehicle.
(b) The original use of the motor vehi-
cle commences with a person other than
the taxpayer.
(c) The motor vehicle is acquired by
the taxpayer in a qualified sale.
(d) The motor vehicle:
(i) meets the requirements of § 30D(d)
(1)(C), (D), (E), (F), and (H) (except for
§ 30D(d)(1)(H)(iv)), or
(ii) is a motor vehicle that:
(A) satisfies the requirements under
§ 30B(b)(3)(A) and (B), and
(B) has a gross vehicle weight rating of
less than 14,000 pounds.
(3) Section 25E(c)(2) defines a “qual-
ified sale” as a sale of a motor vehicle
(A) by a dealer (as defined in § 30D(g)

December 18, 2023 1546 Bulletin No. 2023–51
(8)), (B) for a sale price that does not
exceed $25,000, and (C) that is the first
transfer since August 16, 2022, to a qual-
ified buyer other than the person with
whom the original use of such vehicle
commenced.
(4) Section 25E(c)(3) defines “qualified
buyer” as, with respect to a sale of a motor
vehicle, a taxpayer (A) who is an individ-
ual, (B) who purchases such vehicle for
use and not for resale, (C) with respect
to whom no deduction is allowable with
respect to another taxpayer under § 151,
and (D) who has not been allowed a § 25E
credit for any sale during the 3-year period
ending on the date of the sale of such
vehicle.
(5) Section 25E(c)(4) defines “motor
vehicle” and “capacity” to have the mean-
ing given such terms in § 30D(d)(2) and
(4), respectively.
(6) Section 25E(d) provides that no
credit is allowed under § 25E(a) with
respect to any vehicle unless the taxpayer
includes the vehicle identification number
of such vehicle on the return of tax for the
taxable year.
03. Section 45W, Credit for Qualified
Commercial Clean Vehicles
(1) Section 13403(a) of the IRA added
new § 45W to the Code, which is effec-
tive for vehicles acquired after December
31, 2022, and before January 1, 2033. A
taxpayer can claim a § 45W credit for pur-
chasing and placing in service a qualified
commercial clean vehicle, as defined in
§ 45W(c), during the taxable year. The
amount of the § 45W credit is the lesser
of (1) 15 percent of the taxpayer’s basis
in the vehicle (30 percent in the case of
a vehicle not powered by a gasoline or
diesel internal combustion engine), or
(2) the incremental cost of the vehicle.
Under § 45W(b)(4), the credit is limited
to $7,500 in the case of a vehicle that has
a gross vehicle weight rating of less than
14,000 pounds, and $40,000 for all other
vehicles.
(2) Under § 45W(c), a “qualified com-
mercial clean vehicle” is defined as any
vehicle that is of a character subject to the
allowance for depreciation that:
(a) meets the requirement under
§ 30D(d)(1)(C) of being made by a quali-
fied manufacturer and is acquired for use
or lease by the taxpayer and not for resale,
(b) either:
(i) meets the requirement under
§ 30D(d)(1)(D) of being treated as a motor
vehicle for purposes of title II of the Clean
Air Act and is manufactured primarily for
use on public streets, roads, and highways
(not including a vehicle operated exclu-
sively on a rail or rails), or
(ii) is mobile machinery, as defined in
§ 4053(8) (including vehicles that are not
designed to perform a function of trans-
porting a load over the public highways),
and
(c) either:
(i) is propelled to a significant extent
by an electric motor that draws electric-
ity from a battery that has a capacity of
not less than 15 kilowatt hours (or, in the
case of a vehicle that has a gross vehicle
weight rating of less than 14,000 pounds,
7 kilowatt hours) and is capable of being
recharged from an external source of elec-
tricity, or
(ii) is a motor vehicle that satisfies
the requirements under § 30B(b)(3)(A)
and (B) of being a new qualified fuel cell
motor vehicle.
.04 Revenue Procedure 2022-42
(1) Rev. Proc. 2022-42, in relevant
part, established procedures for qualified
manufacturers to enter into written agree-
ments with the IRS in accordance with
§§ 30D(d)(1)(C) and 30D(d)(3).
(2) Sections 4.01 and 4.02 of Rev.
Proc. 2022-42 provided, respectively,
information regarding the contents of the
written agreement that a manufacturer
must enter into with the IRS to become a
qualified manufacturer and the contents of
the written reports submitted by the quali-
fied manufacturer to the IRS.
(3) Section 6.01 of Rev. Proc. 2022-
42 provided that manufacturers must
send their signed written agreements to
IRS.Clean.Vehicle.Manufacturers@irs.
gov. Section 6.02 of Rev. Proc. 2022-42
provided, in relevant part, that qualified
manufacturers must file written monthly
reports with the IRS by the fifteenth of
the month and may file more frequently.
It further provided that qualified man-
ufacturers must send an email to IRS.
Clean.Vehicles.QM.Reporting@irs.gov
indicating their intent to submit monthly
reports and the IRS will respond with
instructions on how to submit their
reporting information.
.05 Revenue Procedure 2023-33
(1) Rev. Proc. 2023-33, in relevant
part, superseded sections 6.01 and 6.02 of
Rev. Proc. 2022-42, and provided updated
information on written agreements to be
submitted by manufacturers to the IRS to
be considered qualified manufacturers, as
well as the method for qualified manufac-
turers to submit monthly reports, begin-
ning January 1, 2024.
(2) Section 7.01 of Rev. Proc. 2023-
33 updated the information for entering
into a written agreement and provided
that beginning January 1, 2024, to be a
qualified manufacturer, manufacturers
must have entered into a written agree-
ment pursuant to section 4.01 of Rev.
Proc. 2022-42 through the IRS Energy
Credits Online Portal. It also clarified
that manufacturers who previously regis-
tered and filed written agreements under
the procedures in section 6.01 of Rev.
Proc. 2022-42 must enter into new writ-
ten agreements through the IRS Energy
Credits Online Portal, and that the pro-
cedures for manufacturers to enter into
written agreements prior to January 1,
2024, will remain as described in section
6.01 of Rev. Proc. 2022-42.
(3) Section 7.02 of Rev. Proc. 2023-33
updated the information for filing writ-
ten reports by qualified manufacturers
and provided that beginning January 1,
2024, qualified manufacturers must file
the monthly written reports described
in section 4.02 of Rev. Proc. 2022-42
through the IRS Energy Credits Online
Portal by the fifteenth of the month fol-
lowing the month to which each monthly
written report relates. It further stated
that qualified manufacturers may file
reports more frequently than once a
month. Beginning January 1, 2024, man-
ufacturers who previously registered as
qualified manufacturers under the proce-
dures in section 6.01 of Rev. Proc. 2022-
42 must file their written reports through
the IRS Energy Credits Online Portal.
It further clarified that the procedures
for manufacturers to file written reports
prior to January 1, 2024, will remain as
described in section 6.02 of Rev. Proc.
2022-42.
.06 IRS Proposed Regulations
(1) On April 17, 2023, the Treasury
Department and the IRS published a
notice of proposed rulemaking (REG-
120080-22) in the Federal Register (88

Bulletin No. 2023–51 1547 December 18, 2023
F.R. 23370) (April 2023 proposed regu-
lations). The April 2023 proposed regu-
lations provided proposed definitions for
certain terms related to § 30D, proposed
rules regarding personal and business use
and other special rules, and additional pro-
posed rules related to the critical mineral
and battery component requirements.
(2) On October 10, 2023, the Treasury
Department and the IRS published a
notice of proposed rulemaking (REG-
113064-23) in the Federal Register (88
F.R. 70310) (October 2023 proposed reg-
ulations), that contains initial and addi-
tional proposed regulations under §§ 25E,
30D, and 6213.
(3) Concurrently with this revenue
procedure, the Treasury Department and
the IRS are releasing a notice of pro-
posed rulemaking (REG-118492-23)
in the Federal Register, regarding the
excluded entity provisions under § 30D(d)
(7) with respect to the § 30D credit
(December 2023 proposed regulations).
The December 2023 proposed regulations
would provide additional clarity on defi-
nitions with respect to new clean vehicles
eligible for the clean vehicle credit.
(4) References in this revenue proce-
dure to “clean vehicle regulations” are to
the provisions of the April 2023 proposed
regulations, October 2023 proposed reg-
ulations, and December 2023 proposed
regulations described in this section 2.06
of this revenue procedure, once they are
issued in final form.
.07 Department of Energy Guidance
Concurrently with this revenue pro-
cedure, the DOE is releasing proposed
guidance in the Federal Register (DOE
guidance), which proposes interpretations
of certain terms used in the definition
of “foreign entity of concern” (FEOC)
provided in section 40207(a)(5) of the
Infrastructure Investment and Jobs Act
(42 U.S.C. 18741(a)(5)) and as cross-ref-
erenced in § 30D(d)(7).
SECTION 3. DEFINITIONS
.01 In General. Terms used in this rev-
enue procedure and not defined in section
3 of this revenue procedure have the same
meaning as in §§ 30D, 45W and 25E, and
the clean vehicle regulations.
.02 IRS Energy Credits Online Portal.
For purposes of this revenue procedure,
the “IRS Energy Credits Online Portal”
refers to the registration portal that man-
ufacturers and sellers must use to register
as a qualified manufacturer, seller, or reg-
istered dealer. A link to the site is avail-
able on irs.gov. Any successor portal or
successor site address will be announced
and made available on irs.gov.
.03 Model Year. The term “model year”
means the model year determined under
the EPA’s Clean Air Act regulations (see
40 CFR 86.082-2).
SECTION 4. QUALIFIED
MANUFACTURER WRITTEN
AGREEMENTS AND PERIODIC
REPORTING REQUIREMENTS
.01 Qualified Manufacturer Written
Agreements, In General. To meet certain
statutory requirements of §§ 30D, 25E,
and 45W, any manufacturer that currently
produces or previously produced a vehicle
eligible for a credit may enter into a written
agreement with the IRS to become a qual-
ified manufacturer as defined in § 30D(d)
(3). Manufacturers are not qualified manu-
facturers until they have entered into writ-
ten agreements with the IRS. In addition,
any manufacturer of fuel cell vehicles that
is not required to be a qualified manu-
facturer under § 30D(d) is encouraged to
become a qualified manufacturer for pur-
poses of providing the IRS with informa-
tion to facilitate tax administration.
.02 Qualified Manufacturer Written
Agreements Through The IRS Energy
Credits Online Portal. Qualified manu-
facturers may enter into a written agree-
ment through the IRS Energy Credits
Online Portal after the IRS announces
the availability of the Portal on irs.gov.
Beginning January 1, 2024, to be a qual-
ified manufacturer, manufacturers must
have entered into a written agreement
through the IRS Energy Credits Online
Portal. Manufacturers who previously
registered and filed written agreements
under the procedures in section 6.01
of Rev. Proc. 2022-42, section 7.01 of
Rev. Proc. 2023-33, or section 4.03 of
this revenue procedure must enter into
new written agreements through the IRS
Energy Credits Online Portal to be con-
sidered qualified manufacturers on or after
January 1, 2024. An individual represen-
tative of the manufacturer must register
through the IRS Energy Credits Online
Portal and provide the required infor-
mation to request to become a qualified
manufacturer. The manufacturer’s repre-
sentative will need to sign in or create an
account on irs.gov in order to verify the
manufacturer’s business tax information
and register. Help related to the IRS iden-
tity verification process can be found on
the sign-in page or at www.irs.gov/regis-
terhelp. This individual representative of
the manufacturer must be currently autho-
rized to legally bind the manufacturer in
these matters. Before the end of December
2023, the IRS will update its systems to
allow a manufacturer to authorize more
than one employee to make representa-
tions on its behalf through the IRS Energy
Credits Online Portal.
.03 Qualified Manufacturer Written
Agreements Prior to January 1, 2024.
Prior to January 1, 2024, manufacturers
may send their signed written agreements
to IRS.Clean.Vehicle.Manufacturers@
irs.gov to be a qualified manufacturer.
An electronic signature is acceptable.
For written agreements submitted under
this section 4.03, the manufacturer must
provide the IRS a statement signed by a
person currently authorized to bind the
taxpayer in these matters, consistent with
section 4.02 of Rev. Proc. 2022-42.
.04 Updates to Procedures for Qualified
Manufacturer Written Agreements. Any
changes to the content and format of the
written agreement will be provided on irs.
gov or through the IRS Energy Credits
Online Portal, and qualified manufactur-
ers will be notified to enter a revised writ-
ten agreement.
.05 Periodic Reporting Requirements.
The IRS will not consider a vehicle to
meet the requirements of § 30D(d)(1)(C)
unless a qualified manufacturer submits a
written report containing the information
required by section 6 of this revenue pro-
cedure with respect to such vehicle. For
the purposes of § 25E, a qualified man-
ufacturer must submit a written report
or reports containing the information
required by section 6 of this revenue pro-
cedure with respect to a prior model year
vehicle for such vehicle to be considered
a previously-owned clean vehicle, to the
extent such information has not already
been provided for purposes of § 30D and/
or § 45W.

December 18, 2023 1548 Bulletin No. 2023–51
SECTION 5: COMPLIANT-
BATTERY LEDGER FOR
PURPOSES OF SECTION 30D
.01 Introduction.
(1) For calendar years beginning
January 1, 2025, for vehicles to qualify
for the clean vehicle credit under § 30D,
the qualified manufacturer must provide
information to the IRS to establish a com-
pliant-battery ledger for each calendar
year. The compliant-battery ledger (as
defined in the clean vehicle regulations)
for a calendar year tracks a qualified man-
ufacturer’s anticipated supply of batteries
that are FEOC-compliant (as defined in
clean vehicle regulations) for such cal-
endar year. One compliant-battery ledger
may be established for all vehicles for a
calendar year, or there may be separate
ledgers for specific models or classes of
vehicles. For calendar year 2024, the
qualified manufacturer is not required to
provide information to establish a com-
pliant-battery ledger, but the qualified
manufacturer must submit information as
provided in section 5.06 of this revenue
procedure.
(2) To establish a compliant-battery
ledger for a calendar year, the qualified
manufacturer must do the following: (i)
determine a projected number of FEOC-
compliant batteries in accordance with
section 5.02 of this revenue procedure; (ii)
submit an attestation with respect to the
projected number, including supporting
certifications and documentation, in accor-
dance with section 5.03 of this revenue
procedure; and (iii) receive approval of
the projected number (in whole or in part)
from the IRS, as provided in section 5.04
of this revenue procedure. Additionally,
the qualified manufacturer must later sub-
mit a year-end attestation with respect to
the calendar year, as provide in section
5.10 of this revenue procedure. These sub-
missions and attestations must be accurate
to the best of the qualified manufacturer’s
knowledge and belief and provided under
penalties of perjury, and are subject to
review by the IRS and the DOE for errors,
intentional disregard, or fraud.
.02 Determination of projected num-
ber of FEOC-compliant batteries. The
qualified manufacturer must determine
the projected number of batteries that it
knows, or reasonably anticipates based on
its contracts with suppliers, will be FEOC-
compliant, with respect to new clean vehi-
cles (as described in § 30D(d)) for which
the qualified manufacturer anticipates pro-
viding a periodic written report prior to or
during the calendar year and which are
expected to be placed in service by con-
sumers during such calendar year. With
respect to the determination:
(1) The determination is based on
quantity and mass of the battery compo-
nents and applicable critical minerals, as
well as associated constituent materials,
that are procured or contracted for the cal-
endar year and that are known or reason-
ably anticipated to be FEOC-compliant
battery components or FEOC-compliant
applicable critical minerals, as applicable.
(2) The qualified manufacturer must
conduct due diligence (as provided in the
clean vehicle regulations) with respect
to all battery components and applicable
critical minerals, as well as associated
constituent materials, that are relevant to
determining whether such battery compo-
nents or applicable critical minerals are
FEOC-compliant.
(3) The qualified manufacturer must
determine whether all battery compo-
nents, including all battery cells, non-bat-
tery cell battery components, batteries,
and applicable critical minerals, as well
as associated constituent materials, are
FEOC-compliant.
(4) The qualified manufacturer may
rely upon attestations, documentation and
certifications of a third-party manufac-
turer or supplier that operates a battery
cell production facility provided that the
third-party manufacturer or supplier per-
forms due diligence and provides the qual-
ified manufacturer information sufficient
to make the determinations described in
section 5.02 of this revenue procedure. In
the case of multiple third party manufac-
turers or suppliers (such as a case in which
a manufacturer contracts with a battery
manufacturer, who, in turn, contracts with
a manufacturer or supplier who operates
a battery cell production facility), this
requirement must be satisfied by each such
manufacturer or supplier either directly to
the qualified manufacturer or indirectly
through contractual relationships.
.03 Attestations, certifications, and
documentation to be provided to the DOE.
The qualified manufacturer must submit
to the DOE the information described in
section 5.03(1) of this revenue procedure,
and make attestations, under penalty of
perjury, as described in sections 5.03(2)
through 5.03(5) of this revenue procedure.
The qualified manufacturer may make a
separate submission for a specific model
or class of vehicles provided that it speci-
fies in its submission the model or class of
vehicles to which such submission relates.
(1) A compliance report, including sup-
porting documentation in relation to bat-
tery components and applicable critical
minerals, as well as associated constituent
materials, contained in the battery from
which the electric motor of the vehicle
draws electricity. The compliance report
must contain the following information:
(a) A description of measures taken to
exercise due diligence and the approach
taken to determine compliance with the
requirements of § 30D(d)(7).
(b) A list of all battery component man-
ufacturers or assemblers, including man-
ufacturers or assemblers of battery cells,
and documentation appropriately reli-
able and sufficient to determine whether
the battery component manufacturers or
assemblers are foreign entities of con-
cern pursuant to DOE guidance under 42
U.S.C. 18741(a)(5), including:
(i) Ownership and control, as repre-
sented by equity interests, board seats,
and voting rights, based on public and
non-public (if applicable) information.
(ii) Place of incorporation, princi-
pal place of business, individual operat-
ing facilities for relevant materials and
components production, and relevant
activities, based on permits and facility
information.
(iii) Excerpts from licenses and con-
tracts with FEOCs, if applicable, to
demonstrate lack of effective control.
(iv) Additional information as may be
required by the DOE.
(c) A list of the battery cells used by the
qualified manufacturer, including a serial
number or other system used to track
FEOC-compliant battery cells to the bat-
teries they are contained within, as well as
the tracking of battery components used in
the production of battery cells.
(d) A list of applicable critical min-
eral extractors, processors, or recyclers
(including any applicable critical mineral
extraction, processing, or recycling steps

Bulletin No. 2023–51 1549 December 18, 2023
subject to the transition rule for non-trace-
able battery materials), and documenta-
tion appropriately reliable and sufficient
to determine whether the applicable crit-
ical mineral extractors, processors, or
recyclers (including any processors or
recyclers of associated constituent mate-
rials) are foreign entities of concern pur-
suant to DOE guidance under 42 U.S.C.
18741(a)(5), including:
(i) Ownership and control, as repre-
sented by equity interests, board seats,
and voting rights, based on public and
non-public (if applicable) information.
(ii) Place of incorporation, princi-
pal place of business, individual operat-
ing facilities for relevant materials and
components production, and relevant
activities, based on permits and facility
information.
(iii) The dates of purchase of each
applicable critical mineral from each
entity that conducts extraction, process-
ing, or recycling.
(iv) Excerpts from licenses and con-
tracts with FEOCs, if applicable, to
demonstrate lack of effective control.
(v) Additional information as may be
required by the DOE.
(e) A description of the specific steps
that the qualified manufacturer will take
or reasonably anticipates taking to deter-
mine that battery cells and batteries are
FEOC-compliant.
(f) The following quantity and mass
information:
(i) Quantity and/or mass of FEOC-
compliant battery components and FEOC-
compliant applicable critical minerals,
as well as associated constituent materi-
als, from each manufacturer, assembler,
extractor, processor, or recycler (exclud-
ing any applicable critical minerals sub-
ject to the transition rule for non-traceable
battery materials).
(ii) Quantity of FEOC-compliant bat-
tery components divided by the quantity
of each battery component per battery.
(iii) Total mass of each of FEOC-
compliant applicable critical mineral
divided by the quantity of each applicable
critical mineral per battery.
(iv) Quantity of anticipated vehicles
by type, make and model, that are FEOC-
compliant and not FEOC-compliant,
based on battery cell product lines and the
content of associated batteries.
(v) Calculations regarding temporary
allocation-based determinations for appli-
cable critical materials contained in con-
stituent materials of a battery cell.
(vi) Date of each of the calculations
regarding temporary allocation-based
determinations for applicable critical
materials contained in constituent materi-
als of a battery cell.
(g) Proof of mass or quantity for each
FEOC-compliant supplier, specifically
identifying where information is con-
tained regarding the relevant ownership
of each supplier or quantity information,
which includes but is not limited to:
(i) Invoices (timing of delivery/antic-
ipated delivery date) related to battery
components and applicable critical materi-
als contained in the batteries of new clean
vehicles that are included in the allocation
calculations.
(ii) Contractual excerpts, as support-
ing documentation of supply contracts,
including any contractual agreements by
third-party battery cell manufacturers or
suppliers or battery manufacturers to con-
duct due diligence.
(iii) Documentation of additional
sources of supply if there is not yet a con-
tractual agreement but such sources are
deemed highly likely to factor into the
temporary allocation-based determination
calculations.
(iv) Documentation with informa-
tion regarding battery components and
applicable critical minerals, as well as
associated constituent materials, in each
vehicle.
(h) If the qualified manufacturer is rely-
ing on the transition rule for non-traceable
battery materials (as provided in the clean
vehicle regulations), a report demonstrat-
ing how the qualified manufacturer will
comply with the excluded entity restric-
tions once the transition rule is no longer
in effect.
(i) If available, independent analysis or
audit of FEOC compliance factors prior
to submission of the FEOC compliance
information to the DOE, including iden-
tification of the auditor or analyst and the
auditor or analyst’s expertise for perform-
ing such analysis.
(2) An attestation of the projected
number of FEOC-compliant batteries
that the qualified manufacturer has deter-
mined under section 5.02 of this revenue
procedure and an explanation of the basis
of such determination.
(3) An attestation that the qualified
manufacturer has exercised due diligence
to determine that the batteries, battery
cells, battery components, and applica-
ble critical minerals, as well as associated
constituent materials, relating to the vehi-
cles are FEOC-compliant.
(4) An attestation that if any material
changes occur with respect to any infor-
mation provided in this section 5.03(1)
of this revenue procedure, the qualified
manufacturer will report this information
to the DOE as provided in section 5.07 of
this revenue procedure.
(5) An attestation that the information
submitted is true and correct to the best of
the knowledge of the qualified manufac-
turer’s representative.
.04 Upfront Review of Projected
Number of FEOC-Compliant Batteries.
(1) To establish a compliant-battery
ledger, the qualified manufacturer must
submit the attestation of the projected
number of FEOC-compliant batteries
and other information described section
5.03 of this revenue procedure for upfront
review to the DOE through a method pro-
vided by the DOE. The IRS will make a
determination with respect to the submis-
sion, with analytical assistance from the
DOE, and notify the qualified manufac-
turer of its determination.
(2) If a qualified manufacturer sub-
mits the information to the DOE by July
1 of the year prior to the calendar year
for which the compliant-battery ledger is
being established, the DOE will review
the submission and provide its analy-
sis, and the IRS, in consultation with the
DOE, will determine the projected num-
ber of FEOC-compliant batteries for the
qualified manufacturer prior to the begin-
ning of the calendar year. Specifically,
the DOE will review the information
submitted by the qualified manufacturer
within 45 days of the submission, unless
a longer period is agreed to by the quali-
fied manufacturer and the DOE. The DOE
may request additional information from
the qualified manufacturer. The qualified
manufacturer must respond to the request
for additional information within 21 days
of such request, unless a longer period is
agreed to by the qualified manufacturer
and the DOE. The DOE will notify the

December 18, 2023 1550 Bulletin No. 2023–51
qualified manufacturer and the IRS of its
analysis either agreeing with the projected
number of FEOC-compliant batteries
determined and attested to by the quali-
fied manufacturer, disagreeing with such
number, or agreeing with such number in
part, no later than October 1 of the cal-
endar year prior to the calendar year for
which the qualified manufacturer is seek-
ing determination regarding the projected
number of FEOC-compliant batteries.
The IRS will then make a final determi-
nation concerning the projected number
of FEOC-compliant batteries no later than
October 31.
(3) If a qualified manufacturer makes
its submission regarding the projected
number of FEOC-compliant batteries after
July 1 of the year prior to the calendar year
for which the compliant-battery ledger is
being established, the DOE will review
and provide its analysis, and the IRS, in
consultation with the DOE, will make
determinations on a rolling basis.
.05 Right to Administrative Review if
the Projected Number of FEOC-compliant
Batteries is Rejected. If, on the basis of
the DOE’s analysis or otherwise, the IRS
rejects (in whole or in part) the projected
number of FEOC-compliant batteries, the
qualified manufacturer will have 21 days
from the date of the IRS’s determination
to request administrative review of the
DOE’s analysis and IRS’s determination.
If the qualified manufacturer requests
administrative review, it may submit addi-
tional information to the DOE regarding
its projected number of FEOC-compliant
batteries. Once the DOE determines such
additional information is complete, the
DOE will provide the IRS with an updated
analysis within 21 days. The IRS will
make a final determination concerning
the number of FEOC-compliant batteries
within 21 days of receipt of the DOE’s
analysis of the qualified manufacturer’s
request for administrative review and any
additional information submitted during
the administrative review.
.06 Submission of 2024 information.
When the qualified manufacturer submits
the information described in sections 5.02
and 5.03 of this revenue procedure to the
DOE with respect to vehicles it intends
to make available to be placed in service
during calendar year 2025, it must also
submit the information and attestations
described in sections 5.03(1) and 5.03(3)
through 5.03(5) of this revenue proce-
dure with respect to vehicles that have
been placed in service or are expected to
be placed in service during calendar year
2024. However, the submission of the
information related to vehicles that have
been or are expected to be placed in ser-
vice in calendar year 2024 is not required
to include information related to applica-
ble critical minerals, and associated con-
stituent materials.
.07 Increase to compliant-battery led-
ger. Once the compliant-battery ledger is
established for a calendar year, the qual-
ified manufacturer may determine an
additional projected number of batteries
that it knows or reasonably anticipates are
FEOC-compliant due to the procurement
of additional FEOC-compliant battery
components, or FEOC-compliant applica-
ble critical minerals, as well as associated
constituent materials. The qualified man-
ufacturer may then request an increase
to the number in the compliant-battery
ledger by submitting the attestations and
other information described in section
5.03 of this revenue procedure for review
by the DOE through the method described
in section 5.04 of this revenue procedure.
The qualified manufacturer may make
such requests periodically, but may make
no more than one submission per calendar
month. The DOE will review requests no
less frequently than quarterly and provide
its analysis to the IRS. The IRS will make
a final determination concerning the num-
ber of FEOC-compliant batteries within
21 days of receipt of the DOE’s analysis.
The additional projected number, once
approved by the IRS, will result in an
increase to the number of batteries in the
qualified manufacturer’s compliant-bat-
tery ledger. If, on the basis of the DOE’s
analysis or otherwise, the IRS rejects (in
whole or in part) the additional projected
number of FEOC-compliant batteries,
the qualified manufacturer will have 21
days from the date of IRS’s determination
to request administrative review of the
DOE’s analysis and IRS’s determination,
as described in section 5.05 of this reve-
nue procedure.
.08 Reduction in FEOC-compliant bat-
teries for errors or changes.
(1) If the qualified manufacturer discov-
ers an error in or change to the information
provided in the attestations, certifications,
and documentation described in section
5.03 of this revenue procedure for a cal-
endar year that results in a reduction in
the number of FEOC-compliant batteries,
the qualified manufacturer must determine
the amount of the reduction and report to
the DOE through the method described
in section 5.04 of this revenue proce-
dure, within 30 days of such discovery.
This determination and reporting obliga-
tion applies to information with respect
to the current year and any of the prior
three calendar years for which the quali-
fied manufacturer had a compliant-battery
ledger. If the IRS finds, based on DOE
analysis or otherwise, that the reduction in
the number of FEOC-compliant batteries
should be greater than that determined by
the qualified manufacturer, the qualified
manufacturer may request administrative
review from the IRS as described in 5.05
of this revenue procedure.
(2) If any error or change described
in section 5.08(1) of this revenue proce-
dure is discovered in the same calendar
year to which the error or change relates,
there will be a decrease to the compli-
ant-battery ledger for the same calendar
year. The decrease described in the previ-
ous paragraph may decrease the compli-
ant-battery ledger below zero, creating a
negative balance in the compliant-battery
ledger. If the error or change described in
section 5.08(1) is discovered after the end
of the calendar year to which such error or
change relates or in any of the subsequent
three calendar years, the error or change
will decrease the compliant-battery led-
ger for the calendar year for which it is
discovered.
(3) If the IRS or the DOE independently
become aware of any material change to
the information provided in the attesta-
tions, certifications, and documentation
described in section 5.03 of this revenue
procedure, the DOE may request infor-
mation to support or rebut such presumed
material change. This review may result
in updates to the compliant-battery ledger.
.09 Tracking of FEOC-compliant
batteries.
(1) Once the projected number of bat-
teries for a calendar year is approved, the
IRS will enter the compliant-battery led-
ger into the IRS Energy Credits Online
Portal.

Bulletin No. 2023–51 1551 December 18, 2023
(2) At the time the qualified manufac-
turer submits a written report pursuant
to section 6.02 of this revenue procedure
with the IRS, reporting the VIN of a new
clean vehicle as eligible for a § 30D credit,
the total approved number of batteries will
be reduced by the number of batteries con-
tained in such vehicle in the IRS Energy
Credits Online Portal. The VIN of a new
clean vehicle must be associated with the
serial number or serial numbers of the bat-
tery or batteries contained in such vehicle
pursuant to the qualified manufacturer
written reports, described in section 6 of
this revenue procedure.
(3) Once the number of approved bat-
teries in the IRS Energy Credits Online
Portal reaches zero or less than zero, the
qualifying manufacturer will not be able
to submit additional written reports for
new clean vehicles into the IRS Energy
Credits Online Portal.
(4) Any remaining balance in the com-
pliant-battery ledger at the end of the cal-
endar year, whether positive or negative,
will be included in the compliant-battery
ledger for the subsequent calendar year.
If a qualified manufacturer has multiple
compliant-battery accounts with a neg-
ative balance, any negative balance will
first be included in the compliant-battery
ledger for the same model or class of
vehicles for the subsequent calendar year.
However, if there is no ledger for the same
model or class of vehicles in the subse-
quent calendar year, the IRS can account
for such negative balance in the ledger of
a different model or class of vehicles of
the qualified manufacturer.
.10 Year End Attestation. No later than
January 30 of the year after the calendar
year for which a compliant-battery ledger
is established, the qualified manufacturer,
under penalty of perjury, must submit an
attestation to the DOE as to the accuracy
of the calendar year’s projected number of
FEOC-compliant batteries, as established
in sections 5.03 and 5.04 of this revenue
procedure, and as adjusted under sections
5.05, 5.07, and 5.08 of this revenue pro-
cedure. The IRS will make a determina-
tion regarding the year end attestation and
may make appropriate adjustments to the
compliant-battery ledger as described in
sections 5.07 and 5.08 of this revenue pro-
cedure, as a result of such determination.
SECTION 6: WRITTEN REPORTS
BY QUALIFIED MANUFACTURERS
.01 Contents of Written Reports by
Qualified Manufacturers. The written
report providing information for vehicles
that may be eligible for the credit under
§ 30D, § 25E, and/ or § 45W must contain
the name, address, and taxpayer identifi-
cation number of the qualified manufac-
turer. This written report must be provided
by the qualified manufacturer to the IRS in
the time and manner described in section
6.02 of this revenue procedure. In addi-
tion, the written report must contain all of
the following information for any vehicle
that the qualified manufacturer asserts is
eligible for the credit under § 30D, § 25E,
and/ or § 45W:
(1) General Information.
(a) The make, model, model year, and
any other appropriate identifiers of the
motor vehicle;
(b) Certification that the motor vehi-
cle is made by a qualified manufacturer,
within the meaning of § 30D(d)(3);
(c) Certification that the motor vehicle
is treated as a motor vehicle for purposes
of title II of the Clean Air Act;
(d) The gross vehicle weight rating of
the motor vehicle;
(e) The battery capacity of the motor
vehicle;
(f) The motor vehicle’s VIN; and
(g) Such other information as the
Secretary may provide on irs.gov.
(2) Specifically, for § 30D:
(a) Certification that the motor vehicle
is propelled to a significant extent by an
electric motor that draws electricity from
a battery that has a capacity of not less
than 7 kilowatt hours and the battery is
capable of being recharged from an exter-
nal source of electricity, or is a new qual-
ified fuel cell motor vehicle (as defined in
§ 30B(b)(3)).
(b) Certification that the motor vehicle
is manufactured primarily for use on pub-
lic streets, roads and highways (not includ-
ing a vehicle operated exclusively on a rail
or rails) and has at least four wheels.
(c) Certification that the final assem-
bly of the motor vehicle occurred within
North America.
(d) Certification of the percentage of
the value of the applicable critical miner-
als (as defined in § 45X(c)(6)) contained in
the battery from which the electric motor
of the vehicle draws electricity that were
(i) extracted or processed in the United
States, or in any country with which the
United States has a free trade agreement in
effect, or (ii) recycled in North America.
(e) Certification of the percentage of
the value of the components contained in
the battery from which the electric motor
of the vehicle draws electricity that were
manufactured or assembled in North
America.
(f) Whether the motor vehicle is a van,
sport utility vehicle, pickup truck, or other
vehicle.
(g) The motor vehicle’s manufacturer’s
suggested retail price.
(h) For vehicles anticipated to be placed
in service after December 31, 2024:
(i)The number of batteries from which
the electric motor of the motor vehicle
draws electricity.
(ii) The serial number of each battery
in the vehicle.
(iii) A certification that the vehicle con-
tains FEOC-compliant batteries that are
tracked on a compliant-battery ledger.
(i) For vehicles anticipated to be placed
in service after December 31, 2023, certi-
fication that the new clean vehicle meets
the excluded entity requirements in sec-
tion 30D(d)(7) and the clean vehicle
regulations.
(3)
Specifically, for § 25E:
4
(a) Certification that the motor vehicle
is either: propelled to a significant extent
by an electric motor that draws electric-
ity from a battery that has a capacity of
not less than 7 kilowatt hours and the bat-
tery is capable of being recharged from
an external source of electricity, or is a
qualified fuel cell motor vehicle that sat-
isfies the requirements under § 30B(b)(3)
(A) and (B) and has a gross vehicle weight
rating of less than 14,000 pounds.
(b) Certification that the motor vehi-
cle is manufactured primarily for use on
public streets, roads and highways (not
4
For motor vehicles for which such certification has not already been provided for purposes of § 30D and/ or § 45W.

December 18, 2023 1552 Bulletin No. 2023–51
including a vehicle operated exclusively
on a rail or rails) and has at least four
wheels.
(4) Specifically, for § 45W:
(a) For motor vehicles, certification
that the vehicle is manufactured primar-
ily for use on public streets, roads, and
highways (not including a vehicle oper-
ated exclusively on a rail or rails), and is
either: a motor vehicle that is propelled to
a significant extent by an electric motor
that draws electricity from a battery that
has a capacity of not less than 15 kilowatt
hours (or, in the case of a vehicle that has
a gross vehicle weight rating of less than
14,000 pounds, 7 kilowatt hours) and is
capable of being recharged from an exter-
nal source of electricity, or is a new qual-
ified fuel cell motor vehicle that satisfies
the requirements under § 30B(b)(3)(A)
and (B); or
(b) For mobile machinery, certification
that the machinery meets the definition in
§ 4053(8) (including vehicles that are not
designed to perform a function of trans-
porting a load over the public highways),
and that the machinery is either: propelled
to a significant extent by an electric motor
that draws electricity from a battery that
has a capacity of not less than 15 kilowatt
hours (or, in the case of a vehicle that has
a gross vehicle weight rating of less than
14,000 pounds, 7 kilowatt hours) and is
capable of being recharged from an exter-
nal source of electricity, or is a new qual-
ified fuel cell motor vehicle that satisfies
the requirements under § 30B(b)(3)(A)
and (B).
(c) With respect to a motor vehicle with
a gross vehicle weight rating of less than
14,000 pounds, the manufacturer’s sug-
gested retail price.
(5) Attestation Required. Each written
report must include: a declaration, appli-
cable to the certification, statements, and
any accompanying documents, signed by
a person currently authorized to bind the
qualified manufacturer (or, in the case of
a foreign vehicle manufacturer, its domes-
tic distributor) in these matters, in the fol-
lowing form: “Under penalties of perjury,
I declare that I have examined this certi-
fication, including accompanying docu-
ments, and to the best of my knowledge
and belief, the facts presented in support
of this certification are true, correct, and
complete.”
.02 Filing of Written Reports by
Qualified Manufacturers. Qualified man-
ufacturers must file the reports pursuant
to section 6.01 of this revenue procedure
with the IRS on a monthly basis, by the
fifteenth of the month. Qualified manu-
facturers may file reports more frequently
than once a month. Until the IRS pro-
vides otherwise, qualified manufacturers
must send an email to IRS.Clean.Vehicles.
QM.Reporting@irs.gov indicating their
intent to submit monthly reports and the
IRS will respond with instructions on
how to submit their reporting information.
In addition, for any new clean vehicle
under § 30D for which a written report
was previously submitted as described
in section 6.02 of Rev. Proc. 2022-42 or
section 7.02 of Rev. Proc. 2023-33 but
is not placed in service prior to January
1, 2024, qualified manufacturers must
update the written report to include infor-
mation on the vehicle’s compliance with
§ 30D(d)(7). Qualified manufacturers
must send an email to IRS.Clean.Vehicles.
QM.Reporting@irs.gov indicating their
intent to submit updated reports, and the
IRS will respond with instructions on how
to submit their updated reporting informa-
tion. Beginning in 2024, on a date deter-
mined by the IRS, qualified manufacturers
will be required to file the written reports
described in section 6.01 of this revenue
procedure through the IRS Energy Credits
Online Portal monthly by the fifteenth of
the month following the month to which
each monthly written report relates.
Qualified manufacturers may file reports
more frequently than once a month. The
availability of the IRS Energy Credits
Online Portal for submission of written
reports by qualified manufacturers, as well
as any changes to the content and format
of the written reports will be provided on
irs.gov, and qualified manufacturers will
be notified of the update.
.03 Taxpayer’s Reliance. A taxpayer
who acquires a “new clean vehicle,” a
“previously-owned clean vehicle” for
which the seller provides a clean vehicle
seller report, or a “qualified commercial
clean vehicle” and places such vehicle in
service may rely on the manufacturer’s
certification concerning the manufactur-
er’s status as a qualified manufacturer. A
taxpayer also may rely on the informa-
tion and certifications contained in the
qualified manufacturer’s written reports
for the tax credits allowed under §§ 30D,
25E, and 45W.
.04 Erroneous Written Reports. Any
acknowledgment that the IRS provides
for a written report, including a quali-
fied manufacturer’s certifications under
§§ 30D, 45W, and 25E, is not a deter-
mination that a motor vehicle or mobile
machinery qualifies for the credit under
the respective Code sections.
SECTION 7. EFFECT OF ERRORS
AND FRAUD WITH RESPECT TO
SECTION 30D
.01 In General. If the IRS determines,
after consultation with the DOE and after
review of the attestation, certification, and
documentation requirements in section 5
of this revenue procedure relating to the
section 30D credit, that a qualified man-
ufacturer has provided attestations, certi-
fications, or documentation that contain
inaccurate information, it may take appro-
priate action as described in sections 7.02
and 7.03 of this revenue procedure. Such
action would affect vehicles and qualified
manufacturers on a prospective basis.
.02 Inadvertent errors. If the IRS deter-
mines that the attestations, certifications,
or documentation for a specific new clean
vehicle contain inadvertent errors, the IRS
will notify the qualified manufacturer in
writing, and the qualified manufacturer
will have 21 days from the date of the
notification to cure the error or rebut the
IRS’ determination. If the error or errors
are not cured:
(1) In the case of a new clean vehi-
cle that has not been placed in service
for which the qualified manufacturer has
submitted a periodic written report certi-
fying compliance with the requirements
of § 30D(d), such vehicle will no longer
be considered a new clean vehicle eligible
for the § 30D credit.
(2) In the case of a new clean vehicle
that has not been placed in service for
which the qualified manufacturer has not
submitted a periodic written report certi-
fying compliance with the requirement of
§ 30D(d), the qualified manufacturer may
not submit such periodic written report.
(3) In the case of a new clean vehi-
cle that has been placed in service,
the IRS may require a decrease in the

Bulletin No. 2023–51 1553 December 18, 2023
compliant-battery ledger. If the qualified
manufacturer has multiple compliant-bat-
tery ledgers, the IRS may determine which
of the ledgers will be decreased.
.03 Intentional disregard or fraud. If
the IRS determines that a qualified man-
ufacturer intentionally disregarded attes-
tation, certification, or documentation
requirements or reported information
fraudulently or with intentional disregard,
all vehicles of the qualified manufacturer
that have not been placed in service will no
longer be considered new clean vehicles
eligible for the section 30D credit. As an
additional consequence, the IRS may ter-
minate the written agreement between the
IRS and the manufacturer, thereby termi-
nating the manufacturer’s status as a qual-
ified manufacturer. The IRS will notify the
qualified manufacturer in writing of the
determination. If a qualified manufacturer
is notified of the termination of its written
agreement, it will have the opportunity for
administrative review of the IRS’s deter-
mination. During the period that the issue
is pending, the qualified manufacturer will
not be able to certify any vehicles as eligi-
ble for the §§ 30D, 45W, and 25E credits.
Once the IRS makes a final determination,
a qualified manufacturer’s written agree-
ment will either be confirmed as revoked,
fully reinstated, or reinstated under con-
ditions as determined by the IRS. The
qualified manufacturer may submit a new
written agreement to reestablish qualified
manufacturer status only as provided by
the IRS.
SECTION 8. EFFECT ON OTHER
DOCUMENTS
.01 The requirements of sections 4.03
and 4.04 of this revenue procedure regard-
ing filing a written agreement to be a qual-
ified manufacturer before January 1, 2024,
supersede the requirements of section 4.01
of Rev. Proc. 2022-42. Sections 4.02 and
4.04 of this revenue procedure supersede
section 4.02(1) and 7.01 of Rev. Proc.
2023-33, providing information for qual-
ified manufacturers to register and submit
qualified manufacturer written agreements
through the IRS Energy Credits Online
Portal after January 1, 2024.
.02 Section 6.01 of this revenue proce-
dure supersedes section 4.02 of Rev. Proc.
2022-42, regarding the periodic reports
submitted by qualified manufacturers.
Section 6.02 of this revenue procedure
supersedes the requirements of section
7.02 of Rev. Proc. 2023-33, in providing
procedures for qualified manufacturer
filing of monthly written reports through
the IRS Energy Credits Online Portal.
Sections 6.03 and 6.04 of this revenue
procedure supersede sections 4.03 and
4.04 of Rev. Proc. 2022-42, respectively,
providing information for taxpayer reli-
ance and the effect of erroneous reports.
SECTION 9. PAPERWORK
REDUCTION ACT
.01 The collection of information
contained in this revenue procedure
has been submitted, and will be submit-
ted, to the Office of Management and
Budget in accordance with the Paperwork
Reduction Act (44 U.S.C. 3507) under
control number 1545-2311. An agency
may not conduct or sponsor, and a person
is not required to respond to, a collection
of information unless the collection of
information displays a valid OMB control
number.
.02 The collection requirements in sec-
tions 4 and 6 of this revenue procedure
were previously approved by OMB under
control number 1545-2137. This revenue
procedure does not change these collec-
tion requirements. The new collections
of information in this revenue procedure
are in section 5. This information is col-
lected and retained to ensure that vehicles
meet the requirements for the new clean
vehicle credit under § 30D. This infor-
mation will be used to determine whether
the vehicle for which the credit is claimed
by a taxpayer is property that qualifies
for the credit. The collection of informa-
tion is voluntary to obtain a benefit. The
likely respondents are corporations and
partnerships. The IRS will submit the col-
lection requirements under section 5 of
this revenue procedure to OMB under 5
CFR 1320.10. The estimated total annual
reporting burden is 4,450 hours.
.03 The estimated annual burden for
the submission of information to the
DOE before July 1 per respondent is 100
hours. The estimated annual burden for
additional supplemental submissions of
information to the DOE is 25 hours per
respondent. The estimated annual burden
per respondent is 0.25 hours to complete
the qualified manufacturer written reports.
The estimated number of respondents is
25. The estimated annual frequency of
responses is 16.
.04 Books or records relating to a col-
lection of information must be retained as
long as their contents may become mate-
rial in the administration of any internal
revenue law. Generally, tax returns and
tax return information are confidential, as
required by § 6103.
SECTION 10. DRAFTING
INFORMATION
The principal author of this reve-
nue procedure is the Office of Associate
Chief Counsel (Passthroughs & Special
Industries). However, other personnel
from the Treasury Department and the
IRS participated in its development. For
further information regarding this revenue
procedure, call the energy security guid-
ance contact number at (202) 317-5254
(not a toll-free number).
26 CFR 601.105: Examination of returns and claims
for refund, credit or abatement; determination of
correct tax liability.
(Also: Part 1, §§ 6662, 6694, 1.6662-4, 1.6694-2)
Rev. Proc. 2023-40
SECTION 1. PURPOSE
This revenue procedure updates Rev.
Proc. 2022-41, 2022-50 I.R.B. 527, and
identifies circumstances under which the
disclosure on a taxpayer’s income tax
return with respect to an item or position
is adequate for the purpose of reducing the
understatement of income tax under sec-
tion 6662(d) of the Internal Revenue Code
(relating to the substantial understate-
ment aspect of the accuracy-related pen-
alty), and for the purpose of avoiding the
tax return preparer penalty under section
6694(a) (relating to understatements due
to unreasonable positions) with respect
to income tax returns. This revenue pro-
cedure does not apply with respect to any
other penalty provisions (including but
not limited to the disregard provisions of
the section 6662(b)(1) accuracy-related
penalty, the section 6662(i) increased

December 18, 2023 1554 Bulletin No. 2023–51
accuracy-related penalty in the case of non-
disclosed noneconomic substance transac-
tions, and the section 6662(b)(7) and (j)
increased accuracy-related penalty in the
case of undisclosed foreign financial asset
understatements). If this revenue proce-
dure does not include an item or position,
disclosure is adequate with respect to that
item or position only if made on a prop-
erly completed Form 8275 or 8275-R, as
appropriate, attached to the return for the
year or to a qualified amended return. See
Treas. Reg. § 1.6664-2(c) for information
about qualified amended returns.
This revenue procedure applies to any
income tax return filed on 2023 tax forms
for a taxable year beginning in 2023, and
to any income tax return filed in 2024 on
2023 tax forms for short taxable years
beginning in 2024.
SECTION 2. CHANGES FROM REV.
PROC. 2022-41
Changes have been made in order to
update the taxable years to which this rev-
enue procedure applies. No substantive
changes have been made.
SECTION 3. BACKGROUND
.01 If section 6662 applies to any por-
tion of an underpayment of tax required to
be shown on a return, an amount generally
equal to 20 percent of the portion of the
underpayment is added to the tax. Under
section 6662(b)(2), the penalty applies to
the portion of any underpayment of tax
that is attributable to a substantial under-
statement of income tax. The penalty rate
increases to 40 percent in the case of gross
valuation misstatements under section
6662(h), nondisclosed noneconomic sub-
stance transactions under section 6662(i),
or undisclosed foreign financial asset
understatements under section 6662(j).
.02 Generally, there is a substan-
tial understatement of income tax if the
amount of the understatement exceeds
the greater of (i) 10 percent of the amount
of tax required to be shown on the return
for the taxable year or (ii) $5,000. Section
6662(d)(1). Section 6662(d)(1)(C) pro-
vides a special rule for taxpayers claim-
ing a section 199A deduction. In the case
of any taxpayer who claims any deduc-
tion allowed under section 199A for the
taxable year, there is a substantial under-
statement of income tax if the amount of
the understatement exceeds the greater of
(i) 5 percent of the amount of tax required
to be shown on the return for the taxable
year or (ii) $5,000. Section 6662(d)(1)(B)
provides a special rule for corporations.
A corporation (other than an S corpora-
tion or a personal holding company) has
a substantial understatement of income
tax if the amount of the understatement
exceeds the lesser of (i) 10 percent of the
tax required to be shown on the return for
a taxable year (or, if greater, $10,000) or
(ii) $10,000,000. Generally, an under-
statement is the excess of the amount of
tax required to be shown on the return for
the taxable year over the amount of the
tax that is shown on the return reduced
by any rebate, where the excess is deter-
mined without regard to items to which
the reportable transaction understatement
penalty under section 6662A applies.
Section 6662(d)(2)(A). For purposes of
determining whether an understatement
is substantial, the understatement deter-
mined under the general rule is increased
by the aggregate amount of any reportable
transaction understatements relating to the
return. Section 6662A(e)(1)(A).
.03 In the case of an item not attribut-
able to a tax shelter, if the taxpayer has a
reasonable basis for the tax treatment of
the item, the amount of the understate-
ment is reduced by the portion of the
understatement attributable to the item
with respect to which the relevant facts
affecting the item’s tax treatment are
adequately disclosed in the return or in a
statement attached to the return. Section
6662(d)(2)(B)(ii).
.04 Section 6694(a) imposes a penalty
on a tax return preparer who prepares
a return or claim for refund reflecting
an understatement of liability due to an
“unreasonable position” if the tax return
preparer knew (or reasonably should have
known) of the position. A position (other
than a position with respect to a tax shelter
or a reportable transaction to which sec-
tion 6662A applies) is generally treated
as unreasonable unless (i) there is or was
substantial authority for the position, or
(ii) the position was properly disclosed
in accordance with section 6662(d)(2)(B)
(ii)(I) and had a reasonable basis. If the
position is with respect to a tax shelter
(as defined in section 6662(d)(2)(C)(ii))
or a reportable transaction to which sec-
tion 6662A applies, the position is treated
as unreasonable unless it is reasonable
to believe that the position would more
likely than not be sustained on the merits.
See Notice 2009-5, 2009-3 I.R.B. 309, for
interim penalty compliance rules for tax
shelter transactions.
.05 In general, this revenue proce-
dure provides guidance for determining
when disclosure by return is adequate
for purposes of section 6662(d)(2)(B)
(ii) and section 6694(a)(2)(B). For pur-
poses of this revenue procedure, the
taxpayer must furnish all required infor-
mation in accordance with the applicable
forms and instructions, and the money
amounts entered on these forms must be
verifiable.
.06 This revenue procedure may apply
to a return for a fiscal tax year that begins
in 2023 and ends in 2024. This revenue
procedure may also apply to a short year
return for a period beginning in 2024 if
the return is to be filed before the 2024
forms are available. (Note that individuals
are generally not put in this position.) The
most frequent situation in which a short
year arises is when filing a decedent’s final
return for a fractional part of a year. In that
situation, the 2024 form will be available
because the final return is due the fifteenth
day of the fourth month following the close
of the 12-month period that began with the
first day of such fractional part of the year
(meaning the due date is not accelerated).
See
Treas. Reg. § 1.6072-1(b). In the case
of fiscal year and short year returns, the
taxpayer must take into account any tax
law changes that are effective for tax years
beginning after December 31, 2023, even
though these changes are not reflected on
the form or instructions.
.07 This document does not take into
account the effect of tax law changes
effective for tax years beginning after
December 31, 2023. If a line referenced in
this revenue procedure is affected by such
a change and requires additional reporting,
a taxpayer may have to file Form 8275,
Disclosure Statement, or Form 8275-R,
Regulation Disclosure Statement, until the
Service prescribes criteria for complying
with the requirement.
.08 A complete and accurate disclosure
of a tax position on the appropriate year’s

Bulletin No. 2023–51 1555 December 18, 2023
Schedule UTP, Uncertain Tax Position
Statement, will be treated as if the corpo-
ration filed a Form 8275 or Form 8275-R
regarding the tax position. The filing of
a Form 8275 or Form 8275-R, however,
will not be treated as if the corporation
filed a Schedule UTP.
SECTION 4. PROCEDURE
.01 General
(1) Additional disclosure of facts rel-
evant to, or positions taken with respect
to, issues involving any of the items
set forth below is unnecessary for pur-
poses of reducing any understatement of
income tax under section 6662(d) (except
as otherwise provided in section 4.02(3)
concerning Schedules M-1 and M-3), pro-
vided that the forms and attachments are
completed in a clear manner and in accor-
dance with their instructions.
(2) The money amounts entered on the
forms must be verifiable, and the informa-
tion on the return must be disclosed in the
manner described below. For purposes of
this revenue procedure, a number is veri-
fiable if, on audit, the taxpayer can prove
the origin of the amount (even if that
number is not ultimately accepted by the
Service) and the taxpayer can show good
faith in entering that number on the appli-
cable form.
(3) The disclosure of an amount as
provided in section 4.02 below is not
adequate when the understatement arises
from a transaction between parties who
are related within the meaning of section
267(b). If an entry may present a legal
issue or controversy because of a relat-
ed-party transaction, then that transaction
and the relationship must be disclosed on
a Form 8275 or Form 8275-R.
(4) When the amount of an item is
shown on a line that does not have a pre-
printed description identifying that item
(such as on an unnamed line under an
“Other Expense” category), the taxpayer
must clearly identify the item by including
the description on that line. For example,
to disclose a bad debt for a sole proprietor-
ship, the words “bad debt” must be written
or typed on the line of Schedule C (Form
1040 or 1040-SR) that shows the amount
of the bad debt. Also, for Schedule M-3
(Form 1120), Part II, line 25, Other income
(loss) items with differences, or Part III,
line 38, Other expense/deduction items
with differences, the entry must provide
descriptive language; for example, “Cost
of non-compete agreement deductible not
capitalizable,” and the description must be
provided on an attachment. Similarly, for
other forms, if space limitations on a form
do not allow for an adequate description,
the description must be continued on an
attachment.
(5) Although a taxpayer may literally
meet the disclosure requirements of this
revenue procedure, the disclosure will
have no effect for purposes of the section
6662 accuracy-related penalty if the item
or position on the return (1) does not have
a reasonable basis as defined in Treas.
Reg. § 1.6662-3(b)(3); (2) is attributable
to a tax shelter item as defined in section
6662(d)(2)(C)(ii); or (3) is not properly
substantiated or the taxpayer failed to
keep adequate books and records with
respect to the item or position.
(6) Disclosure also will have no effect
for purposes of the section 6694(a) pen-
alty as applicable to tax return preparers if
the position is with respect to a tax shelter
(as defined in section 6662(d)(2)(C)(ii)) or
a reportable transaction to which section
6662A applies.
.02 Items
(1) Form 1040, Schedule A, Itemized
Deductions:
(a) Medical and Dental Expenses:
Complete lines 1 through 4, supplying all
required information.
(b) Taxes: Complete lines 5 through 7,
supplying all required information. Line 6
must list each type of tax and the amount
paid.
(c) Interest Expenses: Complete lines 8
through 10, supplying all required infor-
mation. This section 4.02(1)(c) does not
apply to (i) amounts disallowed under sec-
tion 163(d) unless Form 4952, Investment
Interest Expense Deduction, is completed,
or (ii) amounts disallowed under section
265.
(d) Charitable Contributions: Complete
lines 11 through 14, supplying all required
information and attaching all related forms
required pursuant to statute or regulation.
(e) Casualty and Theft Losses:
Complete Form 4684, Casualties and
Thefts, and attach to the return. Each item
or article for which a casualty or theft loss
is claimed must be listed on Form 4684.
(2) Certain Trade or Business Expenses
(including, for purposes of this section,
the following six expenses as they relate
to the rental of property):
(a) Casualty and Theft Losses: The
procedure outlined in section 4.02(1)(e)
must be followed.
(b) Legal Expenses: The amount
claimed must be stated. This section does
not apply, however, to amounts properly
characterized as capital expenditures, per-
sonal expenses, or non-deductible lobby-
ing or political expenditures, including
amounts that are required to be (or that
are) amortized over a period of years.
(c) Specific Bad Debt Charge-off: The
amount written off must be stated.
(d) Officers’ Compensation: Complete
Form 1125-E, Compensation of Officers,
when its instructions require completion.
You must express the “percent of time
devoted to business” as a numerical per-
centage, rather than as a non-numerical
description such as “part” or “as needed.”
This section does not apply to “excess
parachute payments,” as defined in sec-
tion 280G. This section does not apply
to the extent that remuneration paid or
incurred exceeds an applicable employ-
ee-remuneration deduction limitation
under section 162(m).
(e) Repair Expenses: The amount
claimed must be stated. This section does
not apply, however, to any amount prop-
erly characterized as capital expenditures
or personal expenses.
(f) Taxes (other than foreign taxes):
The amount claimed must be stated.
(3) Differences in book and income tax
reporting:
For Schedule M-1 and all Schedules
M-3, including those listed in (a)-(f)
below, the information provided must
reasonably apprise the Service of the
potential controversy concerning the tax
treatment of the item. If the information
provided does not so apprise the Service, a
Form 8275 or Form 8275-R must be used
to adequately disclose the item (see Part II
of the instructions for those forms).
Note: An item reported on a line with
a pre-printed description, shown on
an attached schedule or “itemized”
on Schedule M-1, may represent the
aggregate amount of several trans-
actions producing that item (i.e.,
a group of similar items, such as

December 18, 2023 1556 Bulletin No. 2023–51
amounts paid or incurred for supplies
by a taxpayer engaged in business).
In some instances, a potentially con-
troversial item may involve a portion
of the aggregate amount disclosed on
the schedule. The Service will not be
reasonably apprised of a potential con-
troversy by the aggregate amount dis-
closed. In these instances, the taxpayer
must use Form 8275 or Form 8275-R
regarding that portion of the item.
Combining unlike items, whether on
Schedule M-1 or Schedule M-3 (or on an
attachment when directed by the instruc-
tions), will not constitute an adequate
disclosure.
Additionally, taxpayers that file the
Schedule M-3 (Form 1120), Net Income
(Loss) Reconciliation for Corporations
With Total Assets of $10 Million or
More, may be required to complete
Schedule B (Form 1120), Additional
Information for Schedule M-3 Filers.
For further information, see Who Must
File in the General Instructions for
Schedule B (Form 1120). Taxpayers
that file the Schedule M-3 (Form 1065),
Net Income (Loss) Reconciliation for
Certain Partnerships, may be required
to complete Schedule C (Form 1065),
Additional Information for Schedule M-3
Filers. For further information, see Who
Must File in the General Instructions
for Schedule C (Form 1065). When
required, these schedules are necessary
to constitute adequate disclosure:
(a) Form 1065. Schedule M-3 (Form 1065), Net Income (Loss) Reconciliation for Certain Partnerships:
Part II (reconciliation of income (loss) items)
Column (a), Income (Loss) per Income Statement;
Column (b), Temporary Difference;
Column (c), Permanent Difference; and
Column (d), Income (Loss) per Tax Return
Part III (reconciliation of expense/deduction
items)
Column (a), Expense per Income Statement;
Column (b), Temporary Difference;
Column (c), Permanent Difference; and
Column (d), Deduction per Tax Return
(b) Form 1120. (i) Schedule M-1, Reconciliation of Income (Loss) per Books With Income per Return.
(ii) Schedule M-3 (Form 1120), Net Income (Loss) Reconciliation for Corporations With Total Assets of $10 Million or More:
Part II (reconciliation of income (loss) items)
Column (a), Income (Loss) per Income Statement;
Column (b), Temporary Difference;
Column (c), Permanent Difference; and
Column (d), Income (Loss) per Tax Return
Part III (reconciliation of expense/deduction
items)
Column (a), Expense per Income Statement;
Column (b), Temporary Difference;
Column (c), Permanent Difference; and
Column (d), Deduction per Tax Return
(c) Form 1120-L. Schedule M-3 (Form 1120-L), Net Income (Loss) Reconciliation for U.S. Life Insurance Companies With Total
Assets of $10 Million or More:
Part II (reconciliation of income (loss) items)
Column (a), Income (Loss) per Income Statement;
Column (b), Temporary Difference;
Column (c), Permanent Difference; and
Column (d), Income (Loss) per Tax Return
Part III (reconciliation of expense/deduction
items)
Column (a), Expense per Income Statement;
Column (b), Temporary Difference;
Column (c), Permanent Difference; and
Column (d), Deduction per Tax Return

Bulletin No. 2023–51 1557 December 18, 2023
(d) Form 1120-PC. Schedule M-3 (Form 1120-PC), Net Income (Loss) Reconciliation for U.S. Property and Casualty Insurance
Companies With Total Assets of $10 Million or More:
Part II (reconciliation of income (loss) items)
Column (a), Income (Loss) per Income Statement;
Column (b), Temporary Difference;
Column (c), Permanent Difference; and
Column (d), Income (Loss) per Tax Return
Part III (reconciliation of expense/deduction
items)
Column (a), Expense per Income Statement;
Column (b), Temporary Difference;
Column (c), Permanent Difference; and
Column (d), Deduction per Tax Return
(e) Form 1120-S. Schedule M-3 (Form 1120-S), Net Income (Loss) Reconciliation for S Corporations With Total Assets of $10
Million or More:
Part II (reconciliation of income (loss) items)
Column (a), Income (Loss) per Income Statement;
Column (b), Temporary Difference;
Column (c), Permanent Difference; and
Column (d), Income (Loss) per Tax Return
Part III (reconciliation of expense/deduction
items)
Column (a), Expense per Income Statement;
Column (b), Temporary Difference;
Column (c), Permanent Difference; and
Column (d), Deduction per Tax Return
(f) Form 1120-F. Schedule M-3 (Form 1120-F), Net Income (Loss) Reconciliation for Foreign Corporations With Reportable
Assets of $10 Million or More:
Part II (reconciliation of income (loss) items)
Column (b), Temporary Differences;
Column (c), Permanent Differences; and
Column (d), Other Permanent Differences for Allocations to Non-ECI and ECI
Part III (reconciliation of expense/deduction
items)
Column (b), Temporary Differences;
Column (c), Permanent Differences; and
Column (d), Other Permanent Differences for Allocations to Non-ECI and ECI
(4) Foreign Tax Items:
(a) International Boycott Transactions:
Transactions disclosed on Form 5713,
International Boycott Report; Schedule
A, International Boycott Factor (Section
999(c)(1)); Schedule B, Specifically
Attributable Taxes and Income (Section
999(c)(2)); and Schedule C, Tax Effect
of the International Boycott Provisions,
must be completed when required by their
instructions.
(b) Treaty-Based Return Position:
Transactions and amounts under sec-
tion 6114 or section 7701(b) as disclosed
on Form 8833, Treaty-Based Return
Position Disclosure Under Section 6114
or 7701(b), must be completed when
required by its instructions.
(5) Other:
(a) Moving Expenses: Complete Form
3903, Moving Expenses, and attach to the
return.
(b) Employee Business Expenses:
Complete Form 2106, Employee Business
Expenses (for use only by Armed Forces
reservists, qualified performing artists,
fee-basis state or local government officials,
and employees with impairment-related
work expenses), and attach to the return.
This section does not apply to club dues or
to travel expenses for any non-employee
accompanying the taxpayer on the trip.
(c) Fuels Credit: Complete Form 4136,
Credit for Federal Tax Paid on Fuels, and
attach to the return.
(d) Investment Credit: Complete Form
3468, Investment Credit, and attach to the
return.
SECTION 5. EFFECTIVE DATE
This revenue procedure applies to any
income tax return filed on a 2023 tax form
for a taxable year beginning in 2023 and
to any income tax return filed on a 2023
tax form in 2024 for a short taxable year
beginning in 2024.
SECTION 6. DRAFTING
INFORMATION
The principal author of this revenue
procedure is Vincent Liu of the Office of
the Associate Chief Counsel (Procedure &
Administration). For further information
regarding this revenue procedure, contact
Branch 2 of Procedure and Administration
at (202) 317-6844 (not a toll free number).

December 18, 2023 1558 Bulletin No. 2023–51
Part IV
Notice of Proposed
Rulemaking
Long-Term, Part-Time
Employee Rules for Cash
or Deferred Arrangements
Under Section 401(k)
REG-104194-23
AGENCY: Internal Revenue Service
(IRS), Treasury.
ACTION: Notice of proposed rulemak-
ing and notice of public hearing.
SUMMARY: This document sets forth
a proposed regulation that would amend
the rules applicable to plans that include
cash or deferred arrangements under
section 401(k) to provide guidance with
respect to long-term, part-time employ-
ees. The proposed regulation reflects
statutory changes made by the SECURE
Act and the SECURE 2.0 Act that relate
to long-term, part-time employees. The
proposed regulation would affect par-
ticipants in, beneficiaries of, employers
maintaining, and administrators of plans
that include cash or deferred arrange-
ments. This document also provides
notice of a public hearing.
DATES: Written or electronic comments
must be received by January 26, 2024. A
public hearing on this proposed regulation
has been scheduled for March 15, 2024, at
10 a.m. ET. Requests to speak and outlines
of topics to be discussed at the public hear-
ing must be received by January 26, 2024.
If no outlines are received by January 26,
2024, the public hearing will be cancelled.
Requests to attend the public hearing must
be received by 5 p.m. ET on March 13,
2024. The public hearing will be made
accessible to people with disabilities.
Requests for special assistance during the
public hearing must be received by March
12, 2024.
ADDRESSES: Commenters are strongly
encouraged to submit public comments
electronically. Submit electronic submis-
sions via the Federal eRulemaking Portal
at www.regulations.gov (indicate IRS and
REG-104194-23) by following the online
instructions for submitting comments.
Requests to speak at or attend the public
hearing must be submitted as prescribed
in the “Comments and Public Hearing”
section. Once submitted to the Federal
eRulemaking Portal, comments cannot be
edited or withdrawn. The Department of
the Treasury (Treasury Department) and
the IRS will publish for public availability
any comment submitted electronically or
on paper to its public docket on www.reg-
ulations.gov. Send paper submissions to:
CC:PA:01:PR (REG-104194-23), Room
5203, Internal Revenue Service, P.O. Box
7604, Ben Franklin Station, Washington,
DC 20044.
FOR FURTHER INFORMATION
CONTACT: Concerning the regula-
tion, call Kara M. Soderstrom at (202)
317-6799 or Jason E. Levine at (202)
317-4148; concerning submission of
comments, the hearing, and the access
code to attend the hearing by telephone,
call Vivian Hayes at (202) 317-6901 (not
toll-free numbers) or email publichear-
ings@irs.gov (preferred).
SUPPLEMENTARY INFORMATION:
Background
This document sets forth proposed
amendments to the Income Tax Regulations
(26 CFR Part 1) under section 401 of
the Internal Revenue Code (Code).
This proposed regulation would amend
§ 1.401(k)-5 to set forth rules and defi-
nitions applicable to long-term, part-time
employees under section 112 of the Setting
Every Community Up for Retirement
Enhancement Act of 2019 (SECURE
Act), enacted on December 20, 2019, as
Division O of the Further Consolidated
Appropriations Act, 2020 (Public Law
116-94, 133 Stat. 2534 (2019)), and sec-
tions 125 and 401 of the SECURE 2.0
Act of 2022 (SECURE 2.0 Act), enacted
on December 29, 2022, as Division T of
the Consolidated Appropriations Act,
2023 (Public Law 117-328, 136 Stat. 4459
(2022)).
I. Statutory and Regulatory Framework
Section 401(k)(1) of the Code pro-
vides that a profit-sharing, stock bonus,
pre-ERISA money purchase, or rural
cooperative plan will not fail to qualify
under section 401(a) merely because it
includes a cash or deferred arrangement
(CODA) that is a qualified CODA. Under
section 401(k)(2), a CODA (generally,
an arrangement providing for an election
by an employee between contributions to
a plan or payments directly in cash) is a
qualified CODA only if it satisfies cer-
tain requirements. Section 401(k)(2)(B)
provides that contributions made pursu-
ant to a qualified CODA (referred to as
elective contributions) may not be dis-
tributed before the occurrence of certain
events, and section 401(k)(2)(C) provides
that amounts attributable to the elective
contributions must be nonforfeitable
at all times. Section 401(k)(2)(D) lim-
its the period of service that a plan may
require an employee to complete with the
employer or employers maintaining the
plan in order to be eligible to participate
in the qualified CODA.
Pursuant to section 401(k)(3)(A), a
CODA is not treated as a qualified CODA
unless: (1) the group of eligible employ-
ees under the CODA satisfies the require-
ments of section 410(b)(1), and (2)
elective contributions under the CODA
satisfy the actual deferral percentage
(ADP) test in section 401(k)(3)(A)(ii).
Under section 401(k)(3)(C), the elective
contributions (including elective contri-
butions that are designated Roth contri-
butions) under a qualified CODA satisfy
the requirements of section 401(a)(4) for
a plan year with respect to the amount of
those contributions if the contributions
satisfy the ADP test for the plan year.
As an alternative to satisfying the annual
ADP test, a plan may satisfy the provi-
sions of section 401(k)(11) (a SIMPLE
401(k) plan), the ADP safe harbor pro-
visions of section 401(k)(12) (a tradi-
tional safe harbor section 401(k) plan),
section 401(k)(13) (a qualified automatic

Bulletin No. 2023–51 1559 December 18, 2023
contribution arrangement (QACA) safe
harbor section 401(k) plan), or sec-
tion 401(k)(16) (a starter 401(k) defer-
ral-only arrangement).
Under section 401(m)(1), the match-
ing contributions and employee con-
tributions under a defined contribution
plan satisfy the requirements of sec-
tion 401(a)(4) for a plan year with
respect to the amount of those contri-
butions only if the actual contribution
percentage (ACP) test in section 401(m)
(2) is satisfied for the plan year. With
respect to matching contributions, as an
alternative to satisfying the annual ACP
test, a plan may satisfy the provisions
of section 401(m)(10) (which parallel
the SIMPLE 401(k) provisions of sec-
tion 401(k)(11)), or the ACP safe harbor
provisions of section 401(m)(11) (a tra-
ditional safe harbor section 401(m) plan)
or section 401(m)(12) (a QACA safe
harbor section 401(m) plan).
The Treasury Department and the IRS
issued comprehensive regulations under
section 401(k) and (m) on December 29,
2004 (TD 9169, 69 FR 78143). Since
they were issued, the regulations have
been updated a number of times. For
example, the regulations were amended
to reflect certain statutory changes (see
TD 9237, 71 FR 6, and TD 9324, 72 FR
21103, providing guidance with respect
to designated Roth contributions under
section 402A; and TD 9447, 74 FR 8200,
providing guidance with respect to sec-
tion 401(k)(13)) and to address discrete
issues unrelated to statutory changes (see
TD 9319, 72 FR 16878, relating to the
definition of compensation; TD 9641, 78
FR 68735, relating to mid-year amend-
ments to safe harbor plan designs; and
TD 9835, 83 FR 34469, relating to
whether qualified nonelective contri-
butions and qualified matching contri-
butions must be nonforfeitable when
contributed to the plan).
The regulations were most recently
amended on September 23, 2019
(TD 9875, 84 FR 49651) to reflect stat-
utory changes related to the restriction
on distribution of elective contributions
under section 401(k)(2)(B).
II. SECURE Act Changes to
Section 401(k) Regarding Long-Term,
Part-Time Employees
Prior to the enactment of the SECURE
Act, section 401(k)(2)(D) provided that
a qualified CODA was not permitted to
require, as a condition of participation, that
an employee complete a period of service
that extended beyond the period permit-
ted under section 410(a)(1) (disregarding
section 410(a)(1)(B)(i)
1
). In general, the
period permitted under section 410(a)(1)
is the later of attainment of age 21 or com-
pletion of a 12-month period during which
the employee has at least 1,000 hours of
service.
Section 112(a) of the SECURE Act
amended section 401(k)(2)(D) of the
Code to provide that a qualified CODA
must permit certain employees to partic-
ipate in the CODA even if they do not
have at least 1,000 hours of service in a
12-month period. Under section 401(k)(2)
(D) (as added by section 112(a)(1) of the
SECURE Act, but prior to amendment by
the SECURE 2.0 Act), a qualified CODA
may not require, as a condition of partici-
pation, that an employee complete a period
of service that extends beyond the close
of the earlier of: (1) the period permit-
ted under section 410(a)(1) (disregarding
section 410(a)(1)(B)(i)); or (2) subject to
section 401(k)(15), the first period of three
consecutive 12-month periods during each
of which the employee is credited with at
least 500 hours of service.
Section 112(a)(2) of the SECURE
Act also amended the Code to add sec-
tion 401(k)(15), which sets forth addi-
tional provisions related to section 401(k)
(2)(D)(ii). Section 401(k)(15)(A) pro-
vides that section 401(k)(2)(D)(ii) will
not apply to an employee unless the
employee has attained the age specified in
section 410(a)(1)(A)(i) by the close of the
last of the 12-month periods described in
section 401(k)(2)(D)(ii). Section 401(k)
(15)(B) (as added by section 112(a)(2) of
the SECURE Act, but prior to amendment
by the SECURE 2.0 Act), modified certain
nondiscrimination, minimum coverage,
top-heavy, and vesting requirements with
respect to employees who become eligible
to participate in a qualified CODA solely
by reason of section 401(k)(2)(D)(ii).
Section 401(k)(15)(B)(i)(I) (as added
by section 112(a)(2) of the SECURE Act,
but prior to amendment by the SECURE
2.0 Act) provided that, notwithstanding
section 401(a)(4), an employer is not
required to make nonelective or matching
contributions on behalf of employees who
are eligible to participate in a qualified
CODA solely by reason of section 401(k)
(2)(D)(ii), even if those contributions
are made on behalf of other employees
eligible to participate in the arrange-
ment. Under section 401(k)(15)(B)(i)
(II) (as added by section 112(a)(2) of the
SECURE Act, but prior to amendment by
the SECURE 2.0 Act), an employer may
elect to exclude employees who are eli-
gible to participate in a qualified CODA
solely by reason of section 401(k)(2)(D)
(ii) from the application of sections 401(a)
(4), 401(k)(3), 401(k)(12), 401(k)(13),
401(m)(2), and 410(b).
Section 401(k)(15)(B)(ii) provides
that an employer may elect to exclude
all employees who are eligible to partici-
pate in a plan maintained by the employer
solely by reason of section 401(k)(2)(D)
(ii) from the application of the top-heavy
vesting and benefit requirements under
section 416(b) and (c).
Under section 401(k)(15)(B)(iii) (as
added by section 112(a) of the SECURE
Act, but prior to amendment by the
SECURE 2.0 Act), an employee described
in section 401(k)(15)(B)(i) must be cred-
ited with a year of service for purposes of
determining whether the employee has a
nonforfeitable right to employer contribu-
tions (other than elective contributions)
under the arrangement for each 12-month
period during which the employee is
credited with at least 500 hours of ser-
vice. In addition, section 401(k)(15)(B)
(iii) modifies the break-in-service rules of
section 411(a)(6) for the employee by sub-
stituting “at least 500 hours of service” for
“more than 500 hours of service” for pur-
poses of applying section 411(a)(6)(A).
Under section 401(k)(15)(B)(iv) (as
added by section 112(a) of the SECURE
1
Section 410(a)(1)(B)(i) provides that a plan may require employees to complete 2 years of service (rather than 1) if accrued benefits under the plan are 100 percent nonforfeitable after not
more than 2 years of service.

December 18, 2023 1560 Bulletin No. 2023–51
Act, but prior to amendment by the
SECURE 2.0 Act), if an employee who
is eligible to participate in a qualified
CODA solely by reason of section 401(k)
(2)(D)(ii) of the Code subsequently satis-
fies the requirements of section 410(a)(1)
(A)(ii) without regard to section 401(k)
(2)(D)(ii), then the special provisions of
section 401(k)(15)(B)(i) and (ii) cease to
apply to the employee as of the first plan
year beginning after the plan year in which
the employee satisfies the requirements of
section 410(a)(1)(A)(ii) without regard
to section 401(k)(2)(D)(ii). However, the
cessation does not apply to the special
vesting rules of section 401(k)(15)(B)(iii).
Section 401(k)(15)(C) provides that
section 401(k)(2)(D)(ii) does not apply to
employees described in section 410(b)(3).
This includes, among others, employees
covered by a collective bargaining agree-
ment with respect to which retirement
benefits were the subject of good faith bar-
gaining and nonresident aliens who have
no earned income from the employer that
constitutes U.S.-source income.
Section 401(k)(15)(D)(i) provides that
the entry date rules of section 410(a)(4)
apply to an employee who is eligible to
participate in a qualified CODA solely
by reason of section 401(k)(2)(D)(ii).
Section 401(k)(15)(D)(ii) provides that
12-month periods are determined in the
same manner as under the last sentence of
section 410(a)(3)(A).
Prior to amendment by the SECURE
2.0 Act, section 112(b) of the SECURE
Act provided that the amendments made
by section 112 apply to plan years begin-
ning after December 31, 2020, except
that, for purposes of section 401(k)(2)(D)
(ii) of the Code, 12-month periods begin-
ning before January 1, 2021, are not taken
into account. The effect of disregard-
ing 12-month periods beginning before
January 1, 2021, is that employees gener-
ally will not become eligible to participate
in a CODA pursuant to section 401(k)(2)
(D)(ii) until plan years beginning on or
after January 1, 2024.
On September 2, 2020, the Treasury
Department and the IRS released
Notice 2020-68, 2020-38 IRB 567,
which includes guidance with respect to
section 112 of the SECURE Act. Q&A
C-1 of Notice 2020-68 explains that,
although section 112(b) of the SECURE
Act excludes 12-month periods begin-
ning before January 1, 2021, for purposes
of determining an employee’s eligibility
to participate in a qualified CODA under
section 401(k)(2)(D)(ii) of the Code,
section 112(b) of the SECURE Act does
not exclude 12-month periods beginning
before January 1, 2021, for purposes
of determining an employee’s nonfor-
feitable right to employer contributions
(other than elective contributions) under
section 401(k)(15)(B)(iii) of the Code.
However, as described in section III.A
of this Background, section 125(d) of the
SECURE 2.0 Act expands the scope of
the disregard of 12-month periods begin-
ning before January 1, 2021, to include
the vesting rules of section 401(k)(15)(B)
(iii).
The Treasury Department and the
IRS received three written comments in
response to Notice 2020-68. All written
comments responding to Notices 2020-68
are available for public inspection and
copying at http://www.regulations.gov or
upon request. These comments are dis-
cussed in section I of the Explanation of
Provisions portion of this preamble.
III. SECURE 2.0 Act Changes to
Section 401(k) Regarding Long-Term,
Part-Time Employees and to
Section 112(b) of the SECURE Act
A. Section 125 of the SECURE 2.0 Act
Section 125 of the SECURE 2.0 Act
generally expands upon the rules set
forth in section 112 of the SECURE Act.
Section 125(a)(1) of the SECURE 2.0
Act amends the minimum participation
standards of section 202 of the Employee
Retirement Income Security Act of 1974
(Public Law 93-406, 88 Stat. 829), as
amended (ERISA) to add section 202(c)
of ERISA. Section 202(c) of ERISA
adds rules, which apply to either a qual-
ified CODA or a salary reduction agree-
ment described in section 403(b) of the
Code, that are comparable to the rules
of section 401(k)(2)(D)(ii) and (k)(15).
Section 125(a)(2)(B)(ii) of the SECURE
2.0 Act amends the employer election
provisions of section 401(k)(15)(B)(i) of
the Code to refer to employees who are
eligible to participate in the arrangement
solely by reason of section 401(k)(2)(D)
(ii) or by reason of section 401(k)(2)(D)
(ii) and section 202(c)(1)(B) of ERISA.
In addition, section 125(c) of the
SECURE 2.0 Act amends the period of
service under section 401(k)(2)(D)(ii)
of the Code by replacing “3” with “2”.
Thus, as amended by section 125(c) of
the SECURE 2.0 Act, section 401(k)(2)
(D) of the Code provides that a qualified
CODA may not require, as a condition of
participation, that an employee complete a
period of service that extends beyond the
close of the earlier of: (1) the period per-
mitted under section 410(a)(1) (disregard-
ing section 410(a)(1)(B)(i)); or (2) subject
to section 401(k)(15), the first period of
two consecutive 12-month periods during
each of which the employee is credited
with at least 500 hours of service.
Section 125(d) of the SECURE 2.0 Act
amends section 112(b) of the SECURE
Act by replacing the reference to sec-
tion 401(k)(2)(D)(ii) of the Code with
references to both section 401(k)(2)(D)
(ii) and (k)(15)(B)(iii). Thus, as amended
by section 125(d) of the SECURE 2.0
Act, section 112(b) of the SECURE Act
provides that 12-month periods beginning
before January 1, 2021, are not taken into
account for purposes of either the eligibil-
ity rule described in section 401(k)(2)(D)
(ii) or the vesting rules of section 401(k)
(15)(B)(iii).
Section 125(e) of the SECURE 2.0
Act amends the special rules for cash or
deferred arrangements using alternative
methods of meeting nondiscrimination
requirements under section 416(g)(4)
(H) of the Code to provide that the term
“top-heavy plan” does not include a plan
solely because that plan does not provide
nonelective or matching contributions to
employees described in section 401(k)
(15)(B)(i).
The amendments made by sec-
tion 125(a) and (c) of the SECURE 2.0
Act apply to plan years beginning after
December 31, 2024. The amendments
made by section 125(d) and (e) of the
SECURE 2.0 Act take effect as if included
in section 112 of the SECURE Act.
B. Section 401 of the SECURE 2.0 Act
Section 401 of the SECURE 2.0 Act
sets forth amendments relating to the
SECURE Act. Section 401(a)(2) of the

Bulletin No. 2023–51 1561 December 18, 2023
SECURE 2.0 Act includes technical
amendments relating to section 112 of the
SECURE Act that take effect as if included
in section 112 of the SECURE Act.
Section 401(a)(2)(A) of the SECURE
2.0 Act amends the employer election pro-
visions of section 401(k)(15)(B)(i)(II) of
the Code to include the ACP safe harbor
provisions of section 401(m)(11) and (12).
Thus, as amended by section 401(a)(2)(A)
of the SECURE 2.0 Act, section 401(k)
(15)(B)(i)(II) of the Code permits an
employer to elect to exclude employ-
ees who are eligible to participate in a
qualified CODA solely by reason of sec-
tion 401(k)(2)(D)(ii) (or by reason of sec-
tion 401(k)(2)(D)(ii) and section 202(c)
(1)(B) of ERISA) from the application of
those ACP safe harbor provisions, in addi-
tion to the other Code provisions listed in
section 401(k)(15)(B)(i)(II).
Section 401(a)(2)(B) of the SECURE
2.0 Act amends the vesting rules of sec-
tion 401(k)(15)(B)(iii) of the Code by
replacing “under the arrangement” with
“under the plan”. Thus, section 401(a)
(2)(B) of the SECURE 2.0 Act clari-
fies that section 401(k)(15)(B)(iii) of the
Code applies for purposes of determining
whether an employee described in sec-
tion 401(k)(15)(B)(i) has a nonforfeitable
right to employer contributions (other
than elective contributions) under the plan
that includes the arrangement.
Section 401(a)(2)(C) of the SECURE
2.0 Act amends the special rules under
section 401(k)(15)(B)(iv) of the Code by
replacing “section 410(a)(1)(A)(ii)” with
“paragraph (2)(D)”. Thus, section 401(a)
(2)(C) of the SECURE 2.0 Act clarifies
that the special rules of section 401(k)(15)
(B)(iv) of the Code apply if an employee
who is eligible to participate in a qualified
CODA solely by reason of section 401(k)
(2)(D)(ii) (or by reason of section 401(k)
(2)(D)(ii) and section 202(c)(1)(B) of
ERISA) subsequently satisfies the require-
ments of section 401(k)(2)(D) without
regard to section 401(k)(2)(D)(ii).
C. Section 501 of the SECURE 2.0 Act
In general, under section 501(a) and
(b) of the SECURE 2.0 Act, for a quali-
fied plan that is not an applicable collec-
tively bargained plan or a governmental
plan within the meaning of section 414(d)
of the Code, the deadline to adopt a plan
amendment that is made pursuant to any
amendment made by the SECURE 2.0
Act or pursuant to any regulation issued
by the Secretary or the Secretary of Labor
(or a delegate of either such Secretary)
under the SECURE 2.0 Act is the last day
of the first plan year beginning on or after
January 1, 2025, or such later date as the
Secretary may prescribe. The plan amend-
ment deadline for an applicable collec-
tively bargained plan or a governmental
plan, as defined in section 414(d), is the
last day of the first plan year beginning on
or after January 1, 2027, or such later date
as the Secretary may prescribe.
Section 501(c)(1) of the SECURE
2.0 Act amends section 601(b)(1) of the
SECURE Act, which provides rules with
respect to a plan amendment made pursu-
ant to a provision of the SECURE Act or
regulations thereunder, to align the dead-
line to adopt such a plan amendment with
the deadline that applies to a plan amend-
ment that is made pursuant to a provision
of the SECURE 2.0 Act.
Whether a plan amendment is made
pursuant to section 112 of the SECURE
Act, related provisions of the SECURE
2.0 Act, or any regulation relating to those
provisions, does not depend on whether
any employees could become eligible to
participate in the CODA as long-term,
part-time employees (as discussed in sec-
tion I.B of the Explanation of Provisions)
under the terms of the amended plan. For
example, if a plan that is not an appli-
cable collectively bargained plan or a
governmental plan is maintained on a
calendar-year basis and provides that,
in order to be eligible to make a cash or
deferred election under the CODA in the
plan, an employee is required to com-
plete a 12-month period during which the
employee is credited with at least 1,000
hours of service, but the employer intends
to amend the plan to provide that, effective
January 1, 2024, each employee is eligible
to make a cash or deferred election as soon
as administratively practicable after the
employee’s employment commencement
date, then the intended plan amendment
would be made pursuant to section 112 of
the SECURE Act and related provisions
of the SECURE 2.0 Act. Accordingly, if
the plan is operated in accordance with the
intended plan amendment, then the plan
amendment would not be required to be
adopted before the deadline that applies
to the plan under section 501 of the
SECURE 2.0 Act (that is, December 31,
2025, or such later date as the Secretary
may prescribe).
Explanation of Provisions
I.
Section 1.401(k)-5
A. Overview
This proposed regulation would
amend § 1.401(k)-5 (which is reserved
for mergers and acquisitions under the
existing regulations) to reflect the rules
for long-term, part-time employees under
section 112 of the SECURE Act and sec-
tions 125 and 401 of the SECURE 2.0 Act.
Proposed § 1.401(k)-5 defines “long-term,
part-time employee,” and, with respect
to each long-term, part-time employee,
requires a qualified CODA to satisfy the
participation requirements of proposed
§ 1.401(k)-5(c) and requires the plan that
includes the CODA to satisfy the vesting
requirements of proposed § 1.401(k)-5(d).
In addition, proposed § 1.401(k)-5(e) pro-
vides guidance regarding nonelective and
matching contributions made to the plan
on behalf of long-term, part-time employ-
ees, and proposed § 1.401(k)-5(f) pro-
vides guidance regarding certain elections
that the employer or employers maintain-
ing the plan may make with respect to
long-term, part-time employees.
B. Long-term, part-time employees
1. Definition
Section 401(k)(15) provides special
rules for “long-term, part-time employees,”
but does not define the term. The rules in
section 401(k)(15) apply to employees
who are eligible to participate in a qualified
CODA solely by reason of section 401(k)
(2)(D)(ii), or by reason of section 401(k)(2)
(D)(ii) and section 202(c)(1)(B) of ERISA.
Under section 112(b) of the SECURE Act,
section 401(k)(2)(D)(ii) of the Code gen-
erally is effective for plan years beginning
after December 31, 2020, but, pursuant to
section 125(c) of the SECURE 2.0 Act, sec-
tion 401(k)(2)(D)(ii) of the Code is amended
to replace “3” with “2” effective for plan

December 18, 2023 1562 Bulletin No. 2023–51
years beginning after December 31, 2024.
Thus, section 401(k)(15) applies to employ-
ees who are eligible to participate in a qual-
ified CODA solely by reason of completing
two consecutive 12-month periods or, with
respect to a plan year beginning before
2025, three consecutive 12-month periods
(referred to as “the applicable number of
consecutive 12-month periods”) during
each of which the employee is credited
with at least 500 hours of service. However,
section 401(k)(15)(A) provides that sec-
tion 401(k)(2)(D)(ii) does not apply to an
employee unless the employee has satisfied
the age requirement of section 410(a)(1)(A)
(i) by the close of the last of the 12-month
periods described in section 401(k)(2)(D)
(ii). In addition, section 401(k)(15)(C)
provides that section 401(k)(2)(D)(ii) does
not apply to employees described in sec-
tion 410(b)(3).
Based on the provisions of sec-
tion 401(k)(15) described in the preceding
paragraph, proposed § 1.401(k)-5(b)(1)
(i) generally would define a “long-term,
part-time employee” as an employee
who is eligible to participate in a quali-
fied CODA solely by reason of having:
(1) completed two consecutive 12-month
periods (under proposed § 1.401(k)-5(b)
(1)(iii), “three consecutive 12-month peri-
ods” would be substituted for “two con-
secutive 12-month periods” with respect
to a plan year beginning in 2024) during
each of which the employee is credited
with at least 500 hours of service (as
defined in section 410(a)(3)(C)); and (2)
attained the age specified in section 410(a)
(1)(A)(i) by the close of the last of those
12-month periods. However, under pro-
posed § 1.401(k)-5(b)(1)(ii), long-term,
part-time employees would not include:
(1) certain employees who are covered
by a collective bargaining agreement,
(2) employees who are nonresident aliens
and who receive no earned income from
the employer that constitutes income
from sources within the United States, or
(3) any other employees described in sec-
tion 410(b)(3).
Although section 401(k)(15)(C) pro-
vides that section 401(k)(2)(D)(ii) does
not apply to employees described in sec-
tion 410(b)(3), section 401(k)(15) does
not provide any exceptions from the max-
imum permissible service requirement of
section 401(k)(2)(D)(ii) for a qualified
CODA in: (1) a governmental plan (as
defined in section 414(d)),
2
or (2) a church
plan (as defined in section 414(e)) with
respect to which the election provided by
section 410(d) has not been made. In addi-
tion to the general request for comments
on this proposed regulation, comments
are specifically requested with respect to
the application of section 401(k)(15) to a
qualified CODA in such a governmental
plan or church plan, including the appli-
cation of proposed § 1.401(k)-5(d)(1)(ii)
(which would clarify that, for purposes of
proposed § 1.401(k)-5(d), section 411 will
be treated as if it applies to the plan, taking
into account the modifications provided in
proposed § 1.401(k)-5(d)(1)(i) and (iii)).
2. Eligibility to Participate
As explained in section I.B.1 of this
Explanation of Provisions, an employee
would be a long-term, part-time employee
under the proposed regulation only if the
employee became eligible to participate in
a qualified CODA solely by reason of hav-
ing completed the applicable number of
consecutive 12-month periods during each
of which the employee is credited with at
least 500 hours of service. The Treasury
Department and the IRS received com-
ments in response to Notice 2020-68
requesting clarification that the rules of
section 401(k)(15) do not apply to an
employee who becomes eligible to par-
ticipate in a qualified CODA prior to
completing the applicable number of con-
secutive 12-month periods during each
of which the employee is credited with at
least 500 hours of service (for example, an
employee who, upon hire, is immediately
eligible to make a cash or deferred elec-
tion under the arrangement).
Under this proposed regulation, an
employee would not be a long-term,
part-time employee unless the employee
becomes eligible to participate in a
qualified CODA solely by reason of hav-
ing completed the applicable number of
consecutive 12-month periods during each
of which the employee is credited with at
least 500 hours of service (as defined in
section 410(a)(3)(C)). Thus, an employee
who becomes eligible to participate in a
qualified CODA by reason of having com-
pleted any other service requirement (or
who is immediately eligible to participate
in the CODA) would not be a long-term,
part-time employee, and the rules of sec-
tion 401(k)(15)(B) would not apply to the
employee, even if the employee is classi-
fied by the employer or employers main-
taining the plan as a part-time employee.
The Treasury Department and the
IRS received a comment in response to
Notice 2020-68 requesting clarification
regarding the application of the rules of
section 401(k)(15) to employees who
were immediately eligible to participate
in a qualified CODA if the plan is later
amended to require employees to com-
plete the period of service described in
section 401(k)(2)(D) in order to partic-
ipate in the CODA. Under this proposed
regulation, an employee who was imme-
diately eligible to participate in a qualified
CODA or who became eligible to partici-
pate based on completing another permis-
sible service requirement (for example,
completing a 1-year period of service
under section 410(a)(1)(A)(ii)) would not
become a long-term, part-time employee
merely because the plan is amended pro-
spectively to require employees hired on
or after the effective date of the amend-
ment to complete the period of service
described in section 401(k)(2)(D). This
is because the employee was not eligible
to participate in the CODA solely by rea-
son of completing the applicable number
of consecutive 12-month periods with at
least 500 hours of service during each
period.
3. Elapsed Time Method of Crediting
Service
Under the elapsed time method of
crediting service set forth in § 1.410(a)-7,
2
Pursuant to section 401(k)(4)(B)(ii) and § 1.401(k)-1(e)(4), a CODA included in a plan maintained by a State or local government or political subdivision thereof, or any agency or instru-
mentality thereof, does not satisfy the requirements to be a qualified CODA if the arrangement is adopted after May 6, 1986. However, this adoption deadline for a qualified CODA does
not apply to a CODA included in a rural cooperative plan or a plan of an employer that is an Indian Tribal government (as defined in section 7701(a)(40)), a subdivision of an Indian Tribal
government (determined in accordance with section 7871(d)), an agency or instrumentality of an Indian Tribal government or subdivision thereof, or a corporation chartered under Federal,
State or Tribal law that is owned in whole or in part by any of those entities.

Bulletin No. 2023–51 1563 December 18, 2023
a plan generally is required to take into
account the period of time that elapses
while an employee is employed with the
employer or employers maintaining the
plan, regardless of the actual number
of hours the employee would have been
credited with during that period. For pur-
poses of determining an employee’s eli-
gibility to participate, a plan generally
may not require an employee to complete
more than a 1-year period of service under
the elapsed time method (regardless of
whether the employee is classified by the
employer or employers maintaining the
plan as a part-time employee).
The Treasury Department and the
IRS received a comment in response to
Notice 2020-68 requesting that a plan be
permitted to determine an employee’s
eligibility to participate as a long-term,
part-time employee using the elapsed time
method. In general, this proposed regulation
would permit a plan to use the elapsed time
method to determine an employee’s eligi-
bility to participate in a qualified CODA.
However, under the elapsed time method,
an employee’s eligibility to participate is
not based upon the actual completion of a
specified number of hours of service during
a 12-month period. Therefore, an employee
who becomes eligible to participate in a
qualified CODA under the elapsed time
method would not be eligible to participate
solely by reason of completing the appli-
cable number of consecutive 12-month
periods with at least 500 hours of service
during each period and would not be a
long-term, part-time employee.
In addition, this proposed regulation does
not include an amendment to the elapsed
time rules under § 1.410(a)-7. Therefore, a
plan may not require an employee, including
an employee who is classified as a part-time
employee, to complete more than a 1-year
period of service under the elapsed time
method in order to be eligible to participate
in a qualified CODA.
4. Equivalency Methods of Crediting
Service
As an alternative to the general method
of crediting service, which is based upon
the actual counting of hours of service,
a plan may credit hours of service using
equivalency methods permitted under
29 CFR 2530.200b-3. Any equivalency
method (or methods) used by a plan must
be set forth in the plan document. For
example, a plan generally may determine
the number of hours of service to be cred-
ited to employees on the basis of months
of employment if an employee is credited
with 190 hours of service for each month
for which the employee would be required
to be credited with at least 1 hour of ser-
vice. Under this equivalency method, the
hours of service credited to an employee
for each month are not affected by whether
the employee is classified by the employer
or employers maintaining the plan as a
part-time employee.
The Treasury Department and the
IRS received a comment in response to
Notice 2020-68 requesting that a plan be
permitted to determine an employee’s
eligibility to participate as a long-term,
part-time employee using an equivalency
method to credit hours of service and
requesting guidance regarding the appli-
cation of the equivalency methods for
purposes of determining an employee’s
eligibility to participate as a long-term,
part-time employee (for example, whether
the minimum number of hours that must
be credited under an equivalency method
would be reduced). Because an employee
is credited with a specified number of
hours under both the general method of
crediting service and the equivalency
methods, this proposed regulation would
permit either the general method of cred-
iting service or an otherwise permissible
equivalency method to be used to deter-
mine whether an employee is credited
with at least 500 hours of service during
a 12-month period. However, for purposes
of determining an employee’s eligibility
to participate as a long-term, part-time
employee, this proposed regulation does
not include an amendment reducing the
number of hours that otherwise would be
credited to the employee under the appli-
cable equivalency method.
C. Participation
1. Time of Participation
This proposed regulation would set
forth rules regarding the date by which
a long-term, part-time employee must
become eligible to make a cash or deferred
election under a qualified CODA (that is,
rules regarding the latest permissible entry
date for a long-term, part-time employee).
The Treasury Department and the
IRS received a comment in response to
Notice 2020-68 requesting confirmation
that a plan may use the same entry date
rules for long-term, part-time employees
as it does for other eligible employees.
Under section 401(k)(15)(D)(i), the entry
date rules of section 410(a)(4) apply to an
employee who is eligible to participate in
an arrangement solely by reason of sec-
tion 401(k)(2)(D)(ii). Accordingly, pro-
posed § 1.401(k)-5(c)(1) reflects the rules
of section 410(a)(4), including the rule in
§ 1.410(a)-4(b) relating to the treatment of
an employee who separates from service
prior to the employee’s scheduled entry
date.
2. Determination of 12-Month Periods
Under section 410(a)(5)(A), in gen-
eral, all years of service with the employer
or employers maintaining the plan must
be taken into account in computing an
employee’s period of service for purposes
of section 410(a)(1). Similarly, proposed
§ 1.401(k)-5(c)(2)(i) would clarify that,
in general, all 12-month periods during
which an employee is credited with at least
500 hours of service with the employer or
employers maintaining the plan must be
taken into account for purposes of deter-
mining whether an employee is eligible
to participate as a long-term, part-time
employee. For example, 12-month periods
during which an employee is included in a
classification of employees who are ineli-
gible to participate in the qualified CODA
generally must be taken into account for
purposes of determining whether the
employee is eligible to participate as a
long-term, part-time employee. However,
pursuant to section 112(b) of the SECURE
Act, 12-month periods beginning before
January 1, 2021, are not taken into account
for purposes of determining whether an
employee is eligible to participate as a
long-term, part-time employee.
With respect to an employee who is
not yet eligible to participate in a qual-
ified CODA, the rules of proposed
§ 1.401(k)-5(c)(2)(i) would not affect the
requirement that the employee complete
the applicable number of consecutive
12-month periods during each of which

December 18, 2023 1564 Bulletin No. 2023–51
the employee is credited with at least 500
hours of service in order to be eligible
to participate as a long-term, part-time
employee. Thus, if an employee who is
not yet eligible to participate in a quali-
fied CODA completes a 12-month period
during which the employee is credited
with fewer than 500 hours of service,
then any prior 12-month periods during
which the employee was credited with at
least 500 (but less than 1,000) hours of
service during each period would not be
taken into account for purposes of deter-
mining whether the employee is eligible
to participate in the CODA as a long-term,
part-time employee.
However, this proposed regulation
does not include any provisions similar
to the break-in-service rules under sec-
tion 410(a)(5) for purposes of determining
whether an employee is eligible to partic-
ipate as a long-term, part-time employee.
Thus, if an employee has become eligible
to participate as a long-term, part-time
employee, then the employee’s eligibil-
ity to participate as a long-term, part-time
employee would not be affected by the
employee’s completion of one or more
12-month periods during each of which
the employee is credited with fewer
than 500 hours of service (although,
as explained in section I.D.1 of this
Explanation of Provisions, a long-term,
part-time employee is not required to be
credited with a year of vesting service with
respect to a 12-month period during which
the employee is credited with fewer than
500 hours of service). Similarly, if a for-
mer employee who was eligible to partic-
ipate as a long-term, part-time employee
is rehired by an employer maintaining the
plan, then the 12-month periods during
which the employee previously was cred-
ited with at least 500 hours of service with
an employer maintaining the plan must be
taken into account for purposes of deter-
mining whether the rehired employee
is eligible to participate as a long-term,
part-time employee.
3
The Treasury Department and the
IRS received a comment in response to
Notice 2020-68 requesting clarification
that the long-term, part-time employee
rules of section 401(k)(15) could apply
to an employee even if 12-month periods
beginning before January 1, 2021, are
used to determine the employee’s eligibil-
ity to participate in the qualified CODA.
However, because section 112(b) of the
SECURE Act provides that 12-month
periods beginning before January 1, 2021,
are not taken into account for purposes
of section 401(k)(2)(D)(ii), this proposed
regulation would exclude any 12-month
period beginning before January 1, 2021,
for purposes of determining whether an
employee is eligible to participate as a
long-term, part-time employee. Therefore,
an employee would not be a long-term,
part-time employee under the proposed
regulation if one or more 12-month peri-
ods beginning before January 1, 2021,
were taken into account for purposes of
determining whether the employee com-
pleted the applicable number of consec-
utive 12-month periods during each of
which the employee was credited with at
least 500 hours of service.
This proposed regulation also includes
rules regarding the date on which a
12-month period may begin for purposes
of determining an employee’s eligibility
to participate as a long-term, part-time
employee.
The Treasury Department and the
IRS received a comment in response to
Notice 2020-68 requesting confirma-
tion that, although an employee’s initial
12-month period for purposes of deter-
mining whether the employee is eligible
to participate as a long-term, part-time
employee must be based on the employ-
ee’s date of hire, subsequent 12-month
periods for the employee may be based on
the plan year. Under section 401(k)(15)(D)
(ii), 12-month periods are determined in
the same manner as under the last sentence
of section 410(a)(3)(A). Accordingly,
under proposed § 1.401(k)-5(c)(2)(ii),
an employee’s initial 12-month period
would begin on the first day for which the
employee is entitled to be credited with
an hour of service; however, the terms
of the plan may provide that, beginning
with the plan year that commences within
that initial 12-month period, subsequent
12-month periods are determined by ref-
erence to the first day of the plan year.
Moreover, the subsequent 12-month peri-
ods with respect to an employee may be
determined by reference to the first day
of the plan year regardless of whether
the employee is credited with at least 500
hours of service during the employee’s
initial 12-month period (provided that
the employee is not credited with at least
1,000 hours of service during the employ-
ee’s initial 12-month period).
If the plan provides that 12-month peri-
ods (after an employee’s initial 12-month
period) are determined by reference to
the first day of the plan year, an employ-
ee’s initial 12-month period and second
12-month period are treated as consec-
utive 12-month periods for purposes of
determining the employee’s eligibility
to participate as a long-term, part-time
employee. Therefore, if an employee is
credited with at least 500 (but less than
1,000) hours of service during each of those
12-month periods, the employee has com-
pleted two consecutive 12-month periods
with at least 500 hours of service during
each period for purposes of determining
the employee’s eligibility to participate as
a long-term, part-time employee. This is
the case even though an employee may be
credited with certain hours of service for
both the initial 12-month period and the
second 12-month period. For an employee
hired prior to January 1, 2021, this pro-
posed regulation provides that 12-month
periods beginning before January 1, 2021,
are not taken into account for purposes of
determining whether the employee is eligi-
ble to participate as a long-term, part-time
employee. Thus, if 12-month periods after
an employee’s initial 12-month period
are determined by reference to the first
day of the plan year, then, with respect
to an employee who was hired prior to
January 1, 2021, the first 12-month period
for purposes of determining whether the
3
If a former employee who previously was eligible to participate in a qualified CODA (but who was not eligible to participate as a long-term, part-time employee) is rehired by an employer
maintaining the plan, then the employee generally would be immediately eligible to participate again in the CODA based on the employee’s prior service with the employer or employers
maintaining the plan. Therefore, that former employee would not be eligible to participate in the qualified CODA as a long-term, part-time employee after being rehired. However, if the for-
mer employee’s eligibility service is disregarded because the plan applies the provisions of section 410(a)(5)(D), then that former employee may become eligible to participate in the qualified
CODA as a long-term, part-time employee after being rehired.

Bulletin No. 2023–51 1565 December 18, 2023
employee is eligible to participate as a
long-term, part-time employee generally
would be determined by reference to the
first day of the first plan year beginning on
or after January 1, 2021.
3. Eligibility Conditions Not Based on
Age or Service
The Treasury Department and the
IRS received comments in response to
Notice 2020-68 requesting clarification
that an employee who otherwise would be
eligible to participate in a qualified CODA
as a long-term, part-time employee may
be excluded from participating in the
CODA if the employee is a member of
a job classification that is not based on
age or service and whose members are
excluded from participating in the CODA
under the terms of the plan.
In response to these comments, this pro-
posed regulation would address whether a
plan may impose conditions that are not
based on age or service in order for an
employee to be eligible to participate in a
qualified CODA as a long-term, part-time
employee. In general, section 401(k)(15)
does not preclude a plan that includes a
CODA from establishing conditions that
must be satisfied in order for an employee
to be eligible to participate in the CODA.
However, a CODA will fail to satisfy
section 401(k)(2)(D) if, as a condition of
participation, the plan imposes an age or
service requirement (or imposes a condi-
tion that has the effect of an age or service
requirement) that requires an employee
to complete a period of service with the
employer or employers maintaining the
plan that extends beyond the close of the
earlier of the periods described in sec-
tion 401(k)(2)(D)(i) and (ii).
Accordingly, proposed § 1.401(k)-5(c)
(3) would clarify that the long-term,
part-time employee rules of § 1.401(k)-5
do not preclude a plan from establishing
an eligibility condition that must be satis-
fied in order for an employee to participate
in the CODA, provided that the condition
is not a proxy for imposing an age or
service requirement (that is, the condi-
tion does not have the effect of imposing
an age or service requirement with the
employer or employers maintaining the
plan) that requires an employee to com-
plete a period of service with the employer
or employers maintaining the plan that
extends beyond the close of the earlier of
the periods described in section 401(k)(2)
(D)(i) and (ii).
4
However, with respect to
an employee who otherwise would be eli-
gible to participate in a qualified CODA
as a long-term, part-time employee, but
who is excluded from participating as
a long-term, part-time employee due to
conditions imposed by the plan, the rules
of section 401(k)(15)(B)(i) and (ii) (disre-
garding long-term, part-time employees
for purposes of nondiscrimination and
coverage testing and top-heavy benefits)
do not apply to that excluded employee.
In addition, the maximum period of
service that the employer or employers
maintaining a plan may require under
section 401(k)(2)(D) applies regardless
of an employee’s job classification. For
example, it would not be permissible for
an employee classified as a temporary
employee to be required to complete a
period of service that is described in sec-
tion 401(k)(2)(D)(ii). This would not be
permissible because section 401(k)(2)
(D) provides that a qualified CODA may
not require, as a condition of participa-
tion, that an employee complete a period
of service that extends beyond the close
of the earlier of the periods described in
section 401(k)(2)(D)(i) and (ii). Thus, if
the employee were to complete the period
described in section 410(a)(1) (deter-
mined without regard to section 410(a)(1)
(B)(i)), then the employee must become
eligible to participate in the CODA under
section 401(k)(2)(D)(i).
Proposed § 1.401(k)-5(c)(1)(iii) would
provide rules addressing the date of par-
ticipation that apply in the case of an
employee who would otherwise be eligi-
ble to participate in the arrangement as a
long-term, part-time employee but who
does not participate solely because the
employee does not satisfy the plan’s eli-
gibility conditions (other than age or ser-
vice) as of the date the employee would
have participated in the arrangement
had the employee satisfied those condi-
tions. If such an employee later satisfies
those conditions, then the employee must
become eligible to participate in the
arrangement immediately upon satisfying
those conditions.
4. Elective Contributions
To avoid a circumvention of the
requirement that a long-term, part-time
employee be eligible to make elective
contributions under a qualified CODA,
proposed § 1.401(k)-5(c)(4) would pro-
vide, in general, that the right to make
elective contributions by a long-term,
part-time employee who is an eligi-
ble non-highly compensated employee
(NHCE) may not be restricted in a man-
ner that would not be permitted for an
NHCE under a safe harbor section 401(k)
plan under § 1.401(k)-3(c)(6). However,
a SIMPLE 401(k) plan would be permit-
ted to limit the amount of elective contri-
butions made by a long-term, part-time
employee under the plan to the extent
needed to satisfy the elective contribution
limitation for SIMPLE 401(k) plans under
section 401(k)(11)(B)(i)(I) and (m)(10)
(A).
D. Vesting
1. Years of Vesting Service Taken into
Account
This proposed regulation would pro-
vide vesting rules for purposes of deter-
mining whether a long-term, part-time
employee (or former long-term, part-time
employee, as explained in section I.D.2
of this Explanation of Provisions) has a
nonforfeitable right to employer contri-
butions under the plan (other than elective
contributions).
In general, the nonforfeitable right
of a long-term, part-time employee (or
former long-term, part-time employee)
to employer contributions under the
plan (other than elective contributions)
would be determined under the rules
of section 411. However, pursuant to
section 401(k)(15)(B)(iii), proposed
§ 1.401(k)-5(d)(1)(i)(A) would provide
that each 12-month period during which
a long-term, part-time employee (or
4
The rules of proposed § 1.401(k)-5(c)(3) are intended to align with those of § 1.410(a)-3(d) and (e).

December 18, 2023 1566 Bulletin No. 2023–51
former long-term, part-time employee) is
credited with at least 500 hours of service
(as defined in section 410(a)(3)(C)) with
the employer or employers maintaining
the plan is treated as a year of vesting
service.
The Treasury Department and the
IRS received a comment in response to
Notice 2020-68 requesting clarification
that, for purposes of determining vest-
ing service for a long-term, part-time
employee, a plan may use the same vest-
ing computation period that it uses for
other employees and is not required to
use the long-term, part-time employee’s
eligibility computation period. Under sec-
tion 411(a)(5)(A), a vesting computation
period generally may be a calendar year,
plan year, or other 12-consecutive month
period designated by the plan (and not
prohibited under regulations prescribed
by the Secretary of Labor). Section 401(k)
(15)(D)(ii) provides that 12-month peri-
ods are determined in the same manner as
under the last sentence of section 410(a)
(3)(A). However, the introductory lan-
guage of section 401(k)(15) states that
it applies “for purposes of paragraph (2)
(D)(ii)” (that is, the eligibility rules of
section 401(k)(2)(D)(ii)). Based on this
language, this proposed regulation would
apply the rule under section 401(k)(15)
(D)(ii) for purposes of section 401(k)(2)
(D)(ii) but would not extend the appli-
cation of that rule to the vesting rules of
section 401(k)(15)(B)(iii). Accordingly,
in response to this comment, proposed
§ 1.401(k)-5(d)(1)(i)(A) would clarify that
a plan may designate any 12-consecutive
month period that is not prohibited for use
under section 411(a) for purposes of deter-
mining a long-term, part-time employee’s
(or former long-term, part-time employ-
ee’s) vesting service.
In addition, pursuant to section 401(k)
(15)(B)(iii), proposed § 1.401(k)-5(d)
(1)(iii) would provide that, for purposes
of determining whether a long-term,
part-time employee (or former long-term,
part-time employee) has incurred a 1-year
break in service, section 411(a)(6)(A) is
applied by substituting “at least 500 hours
of service” for “more than 500 hours of
service.”
This proposed regulation also would
provide guidance regarding 12-month
periods that must be taken into account
for purposes of determining a long-term,
part-time employee’s (or former
long-term, part-time employee’s) years
of vesting service. As described in sec-
tion II of the Background portion of this
preamble, Q&A C-1 of Notice 2020-68
provides that, unless a long-term,
part-time employee’s years of service
may be disregarded under section 411(a)
(4) (for example, years of service before
the employee attains age 18), all years of
service with the employer or employers
maintaining the plan must be taken into
account for purposes of determining the
long-term, part-time employee’s nonfor-
feitable right to employer contributions
under section 401(k)(15)(B)(iii), includ-
ing 12-month periods beginning before
January 1, 2021.
However, section 125(d) of the
SECURE 2.0 Act amended section 112(b)
of the SECURE Act (effective as if
included in section 112 of the SECURE
Act) to provide that 12-month periods
beginning before January 1, 2021, are
not taken into account for purposes of
either the eligibility rule described in
section 401(k)(2)(D)(ii) or the vesting
rules of section 401(k)(15)(B)(iii). Thus,
Q&A C-1 of Notice 2020-68 was effec-
tively rendered obsolete by the enact-
ment of section 125(d) of the SECURE
2.0 Act.
Accordingly, proposed § 1.401(k)-5(d)
(1)(i)(B) generally would require that
all 12-month periods of service with the
employer or employers maintaining the
plan must be taken into account for pur-
poses of determining the nonforfeitable
right of a long-term, part-time employee
(or former long-term, part-time employee)
to employer contributions (other than
elective contributions), unless the period
of service of the employee may be dis-
regarded under section 411(a) (which
takes into account section 411(a)(4), (a)
(6), and (a)(7)(B)). In addition, proposed
§ 1.401(k)-5(d)(1)(i)(B) would reflect
section 125(d) of the SECURE 2.0 Act
by permitting any 12-month period
beginning before January 1, 2021, to be
excluded for purposes of determining
the nonforfeitable right of a long-term,
part-time employee (or former long-term,
part-time employee) to employer contri-
butions (other than elective contributions)
under the plan.
2. Former Long-Term, Part-Time
Employees
This proposed regulation would pro-
vide rules for an employee who becomes
eligible to participate in a qualified CODA
as a long-term, part-time employee but
who subsequently completes 1 year of
service under section 410(a)(1)(A)(ii) or
who ceases to satisfy the plan’s eligibil-
ity conditions (other than age or service
conditions).
Under section 401(k)(15)(B)(iv), the
rules of section 401(k)(15)(B) (other than
the vesting rules of section 401(k)(15)
(B)(iii)) cease to apply to any employee
as of the first plan year beginning after
the plan year in which the employee sat-
isfies the requirements of section 401(k)
(2)(D) without regard to section 401(k)
(2)(D)(ii) (that is, satisfies the require-
ments of section 410(a)(1)(A)(ii) without
regard to section 410(a)(1)(B)(i)). Thus,
the nondiscrimination and coverage test-
ing provisions of section 401(k)(15)(B)
(i) and the top-heavy benefit provisions of
section 401(k)(15)(B)(ii) cease to apply
to any employee as of the first plan year
beginning after the plan year in which
the employee satisfies the requirements
of section 401(k)(2)(D) without regard to
section 401(k)(2)(D)(ii), but the vesting
rules of section 401(k)(15)(B)(iii) con-
tinue to apply to the employee.
Proposed § 1.401(k)-5(d)(2) would
reflect the rules of section 401(k)(15)(B)
(iv) by providing that an employee ceases
to be a long-term, part-time employee
and becomes a former long-term,
part-time employee as of the first day
of the first plan year beginning after the
plan year in which the employee satis-
fies the requirements of section 401(k)
(2)(D) without regard to section 401(k)
(2)(D)(ii). The nondiscrimination pro-
visions of proposed § 1.401(k)-5(e)(1)
(which are explained in section I.E.1 of
this Explanation of Provisions) and the
employer election provisions of pro-
posed § 1.401(k)-5(f)(1) and (2) (which
are explained in section I.F of this
Explanation of Provisions) would not
apply to a former long-term, part-time
employee (regardless of whether the
former long-term, part-time employee
subsequently completes one or more
12-month periods during each of which

Bulletin No. 2023–51 1567 December 18, 2023
the employee is credited with at least
500 (but less than 1,000) hours of ser-
vice). However, the vesting rules of pro-
posed § 1.401(k)-5(d)(1) (as explained
in section I.D.1 of this Explanation of
Provisions) would continue to apply to
a former long-term, part-time employee.
Thus, a former long-term, part-time
employee would continue to be credited
with a year of vesting service for any
12-month period during which the former
long-term, part-time employee is credited
with at least 500 hours of service with the
employer or employers maintaining the
plan (unless the period of service may be
disregarded under section 411(a)).
The Treasury Department and the
IRS received a comment in response to
Notice 2020-68 requesting clarification
regarding the application of the vest-
ing rules of section 401(k)(15)(B)(iii)
and (iv) with respect to an employee who:
(1) becomes eligible to participate as a
long-term, part-time employee, but who
subsequently completes 1 year of ser-
vice under section 410(a)(1)(A)(ii); or (2)
becomes eligible to participate because
the employee completed 1 year of service
under section 410(a)(1)(A)(ii), but who
also completes (before or after becom-
ing eligible to participate) one or more
12-month periods during each of which
the employee is credited with at least 500
(but less than 1,000) hours of service.
Under this proposed regulation, the
vesting rules of proposed § 1.401(k)-5(d)
(1) would continue to apply to a long-term,
part-time employee who completes 1 year
of service under section 410(a)(1)(A)(ii).
However, an employee who becomes eli-
gible to participate in a qualified CODA
because the employee completes 1 year
of service under section 410(a)(1)(A)
(ii) would not be eligible to participate
in the CODA solely by reason of com-
pleting the applicable number of con-
secutive 12-month periods during each
of which the employee is credited with
at least 500 hours of service. Therefore,
the employee would not be a long-term,
part-time employee, and the vesting rules
of proposed § 1.401(k)-5(d)(1) would
not apply to the employee (regardless of
whether the employee also completes,
before or after becoming eligible to partic-
ipate in the qualified CODA, one or more
12-month periods during each of which
the employee is credited with at least 500
(but less than 1,000) hours of service).
Section 401(k)(15) does not address
a long-term, part-time employee who
ceases to satisfy a plan’s eligibility con-
ditions (other than age or service condi-
tions) for participation in the qualified
CODA included in the plan. However, this
proposed regulation would provide rules
similar to those of section 401(k)(15)(B)
(iv) with respect to a long-term, part-time
employee who ceases to be eligible to par-
ticipate in a qualified CODA. Therefore,
proposed § 1.401(k)-5(d)(2)(ii) would pro-
vide that a long-term, part-time employee
becomes a former long-term, part-time
employee as of the first day of the first
plan year beginning after the earlier of the
plan year in which the employee: (1) sat-
isfies the requirements of section 401(k)
(2)(D) without regard to section 401(k)(2)
(D)(ii); or (2) ceases to satisfy the plan’s
eligibility conditions (other than age or
service conditions). Regardless of the rea-
son that a long-term, part-time employee
becomes a former long-term, part-time
employee, this proposed regulation would
provide that the nondiscrimination provi-
sions of proposed § 1.401(k)-5(e)(1) and
the employer election provisions of pro-
posed § 1.401(k)-5(f)(1) and (2) do not
apply to a former long-term, part-time
employee (although the vesting rules
of proposed § 1.401(k)-5(d)(1) would
continue to apply to a former long-term,
part-time employee).
Unlike the rules that would apply to
a long-term, part-time employee who
becomes a former long-term, part-time
employee by reason of satisfying the
requirements of section 401(k)(2)(D)
without regard to section 401(k)(2)(D)(ii)
(that is, by reason of having completed
1 year of service under section 410(a)
(1)(A)(ii)), proposed § 1.401(k)-5(d)
(2)(iii) would provide that a long-term,
part-time employee who ceases to satisfy
the plan’s eligibility conditions (other than
age or service conditions) during a plan
year generally will return to long-term,
part-time employee status as of the first
day of the plan year during which the
employee again satisfies those conditions.
However, that employee would not return
to long-term, part-time employee status if
the employee also is a former long-term,
part-time employee by reason of having
completed 1 year of service under sec-
tion 410(a)(1)(A)(ii). Although proposed
§ 1.401(k)-5(d)(2)(iii) would permit an
employee’s status to change from that of
a former long-term, part-time employee
to a long-term, part-time employee during
the plan year, this proposed regulation
would not permit an employee to be both
a long-term, part-time employee and a
former long-term, part-time employee for
that plan year. Similarly, under this pro-
posed regulation, if a long-term, part-time
employee ceases to satisfy the plan’s eligi-
bility conditions (other than age or service
conditions) during a plan year, but again
satisfies those conditions during the same
plan year, the employee would remain a
long-term, part-time employee for the
entire plan year.
Accordingly, proposed § 1.401(k)-5(d)
(2)(i) would define a former long-term,
part-time employee as an employee who
became eligible to participate in the
arrangement as a long-term, part-time
employee; subsequently ceased to be a
long-term, part-time employee because
the employee was described in proposed
§ 1.401(k)-5(d)(2)(ii)(A) or (B); and
has not returned to long-term, part-time
employee status in accordance with pro-
posed § 1.401(k)-5(d)(2)(iii). Thus, under
this proposed definition, an employee first
must become eligible to participate in a
qualified CODA as a long-term, part-time
employee before the employee may
become a former long-term, part-time
employee.
E. Nonelective and matching
contributions
1. General Rule
This proposed regulation reflects
the nondiscrimination provisions of
section 401(k)(15)(B)(i)(I). Proposed
§ 1.401(k)-5(e)(1) would provide that,
notwithstanding section 401(a)(4), nei-
ther nonelective nor matching contribu-
tions are required to be made on behalf
of long-term, part-time employees, even
if those contributions are made on behalf
of other eligible employees. However,
as explained in section I.D.2 of this
Explanation of Provisions, proposed
§ 1.401(k)-5(e)(1) would not apply to for-
mer long-term, part-time employees.

December 18, 2023 1568 Bulletin No. 2023–51
2. Coordination with Employer Elections
In addition to section 401(a)(4), other
Code sections affect whether contribu-
tions must be made on behalf of long-term,
part-time employees. Accordingly, pro-
posed § 1.401(k)-5(e)(2) would address
the safe harbor section 401(k) plan
contribution requirements under sec-
tion 401(k)(12) and (13), the safe harbor
section 401(m) plan contribution require-
ments under section 401(m)(11) and (12),
the top-heavy benefit requirements under
section 416, and the SIMPLE 401(k) plan
contribution requirements under sec-
tion 401(k)(11) and (m)(10).
As explained in section I.F.1 of this
Explanation of Provisions, this pro-
posed regulation would provide that
the employer or employers maintaining
a plan are permitted to elect to exclude
long-term, part-time employees for pur-
poses of determining whether the plan
satisfies the ADP safe harbor provisions
of section 401(k)(12) and (13), the ACP
safe harbor provisions of section 401(m)
(11) and (12), and certain other non-
discrimination and coverage testing
provisions. Similarly, as explained in
section I.F.2 of this Explanation of
Provisions, this proposed regulation
would permit the employer or employers
maintaining the plan to elect to exclude
long-term, part-time employees for pur-
poses of determining whether the plan
satisfies the top-heavy vesting and bene-
fit requirements of section 416(b) and (c).
However, this proposed regulation would
not permit an employer to elect to exclude
long-term, part-time employees for pur-
poses of determining whether a plan sat-
isfies the SIMPLE 401(k) provisions of
section 401(k)(11) and (m)(10).
Therefore, proposed § 1.401(k)-5(e)
(2)(i) would clarify that if long-term,
part-time employees are excluded for
purposes of determining whether a plan
satisfies the ADP safe harbor provisions
of section 401(k)(12) or (13) (and, if
applicable, the ACP safe harbor provi-
sions of section 401(m)(11) or (12)),
then the plan will not fail to satisfy those
provisions merely because the employer
does not make a nonelective or match-
ing contribution on behalf of an eligible
NHCE who is a long-term, part-time
employee (or makes a nonelective or
matching contribution that would not sat-
isfy the safe harbor contribution require-
ments on behalf of the eligible NHCE).
Similarly, proposed § 1.401(k)-5(e)(2)(ii)
would clarify that if long-term, part-time
employees are excluded for purposes of
determining whether the plan satisfies the
minimum benefit requirements of sec-
tion 416(c) for the plan year, then the plan
will not fail to satisfy the minimum bene-
fit requirements of section 416(c) merely
because the employer contribution (if
any) made for the plan year on behalf of
a non-key employee who is a long-term,
part-time employee does not satisfy those
requirements.
However, proposed § 1.401(k)-5(e)
(2)(iii) would clarify that, because an
employer may not elect under this pro-
posed regulation to exclude long-term,
part-time employees from the applica-
tion of the SIMPLE 401(k) provisions of
section 401(k)(11) and (m)(10), a plan
intended to satisfy the SIMPLE 401(k)
provisions of section 401(k)(11) or (m)
(10) must satisfy the matching or non-
elective contribution requirements of
§ 1.401(k)-4(e) with respect to long-term,
part-time employees.
F. Employer elections
1. Nondiscrimination and Coverage
This proposed regulation generally
reflects the provisions of section 401(k)
(15)(B)(i)(II). Section 401(k)(15)(B)
(i)(II) permits an employer to elect to
exclude long-term, part-time employees
from the application of the nondiscrim-
ination requirements of section 401(a)
(4), the ADP test of section 401(k)(3),
the ADP safe harbor provisions of sec-
tion 401(k)(12) and (13), the ACP test
of section 401(m)(2), the ACP safe har-
bor provisions of section 401(m)(11) and
(12), and the minimum coverage require-
ments of section 410(b). Accordingly, pro-
posed § 1.401(k)-5(f)(1) generally would
permit an employer to elect to exclude
long-term, part-time employees (but not
former long-term, part-time employ-
ees, as explained in section I.D.2 of this
Explanation of Provisions) for purposes of
determining whether a plan satisfies those
nondiscrimination and minimum cover-
age requirements.
The nondiscrimination and minimum
coverage requirements listed in sec-
tion 401(k)(15)(B)(i)(II) do not include
the SIMPLE 401(k) provisions of sec-
tion 401(k)(11) and (m)(10). Accordingly,
an employer election under proposed
§ 1.401(k)-5(f)(1) would not exclude
long-term, part-time employees for pur-
poses of determining whether a plan sat-
isfies the SIMPLE 401(k) requirements of
section 401(k)(11) and (m)(10).
For purposes of section 410(b), if
long-term, part-time employees are not
excluded for purposes of determining
whether the plan satisfies section 410(b)
pursuant to an employer election under
proposed § 1.401(k)-5(f)(1), then those
employees generally will be otherwise
excludable employees for purposes of
section 410(b)(4)(B) and § 1.410(b)-6(b)
(3) because those long-term, part-time
employees will not have satisfied the ser-
vice requirements of section 410(a)(1)
(without regard to section 410(a)(1)(B)).
However, former long-term, part-time
employees who have completed 1 year of
service under section 410(a)(1)(A)(ii) will
not be otherwise excludable employees
because those former long-term, part-time
employees will have satisfied the min-
imum age and service requirements of
section 410(a)(1) (without regard to sec-
tion 410(a)(1)(B)).
The Treasury Department and the
IRS received a comment in response to
Notice 2020-68 requesting clarification
that an employer may elect to exclude
long-term, part-time employees for pur-
poses of certain nondiscrimination and
coverage testing provisions listed in sec-
tion 401(k)(15)(B)(i)(II), but include
long-term, part-time employees for other
of those provisions. This proposed regula-
tion would not provide for such an option
because of the interconnection among
the nondiscrimination and coverage test-
ing provisions listed in section 401(k)
(15)(B)(i)(II) and the risk that disregard-
ing long-term, part-time employees for
purposes of some (but not all) of those
nondiscrimination and coverage testing
provisions could result in discrimination
against NHCEs who are not long-term,
part-time employees. Accordingly, this
proposed regulation would clarify that
an employer election under proposed
§ 1.401(k)-5(f)(1) applies for purposes

Bulletin No. 2023–51 1569 December 18, 2023
of every nondiscrimination and coverage
testing provision listed in section 401(k)
(15)(B)(i)(II) (to the extent the provi-
sion otherwise would apply to the plan)
and applies with respect to all long-term,
part-time employees who are eligible to
participate in the qualified CODA.
With respect to a plan that is intended to
satisfy the ADP safe harbor provisions of
section 401(k)(12) or (13), this proposed
regulation would clarify that an election
under proposed § 1.401(k)-5(f)(1) must
be set forth in the plan and satisfy the plan
year requirements of § 1.401(k)-3(e). This
proposed regulation would set forth a sim-
ilar requirement for a plan that is intended
to satisfy the ACP safe harbor provisions
of section 401(m)(11) or (12). Therefore,
with respect to these plans, in order for an
election to satisfy the conditions of pro-
posed § 1.401(k)-5(f)(1), the terms of the
plan must provide clearly that long-term,
part-time employees are excluded for pur-
poses of the ADP safe harbor provisions
of section 401(k)(12) or (13), the ACP
safe harbor provisions of section 401(m)
(11) or (12), and any other provisions
under proposed § 1.401(k)-5(f)(1)(i) that
otherwise would apply to the plan.
With respect to a plan that is not
intended to satisfy the ADP safe harbor
provisions of section 401(k)(12) or (13)
or the ACP safe harbor provisions of sec-
tion 401(m)(11) or (12) for a plan year, this
proposed regulation would not require an
election under proposed § 1.401(k)-5(f)
(1) to be set forth in the plan. However,
in order for the employer or employers
maintaining the plan to make an election
under proposed § 1.401(k)-5(f)(1), the
terms of the plan would need to provide
enabling language. Thus, in the case of a
plan that is not intended to satisfy the ADP
safe harbor provisions of section 401(k)
(12) or (13) or the ACP safe harbor pro-
visions of section 401(m)(11) or (12) for
a plan year, if the plan document does not
include enabling language, or an election
under proposed § 1.401(k)-5(f)(1) is not
made, then long-term, part-time employ-
ees would not be excluded for purposes
of determining whether the plan satis-
fies the nondiscrimination requirements
of section 401(a)(4), the ADP test of
section 401(k)(3), the ACP test of sec-
tion 401(m)(2), or the minimum coverage
requirements of section 410(b) (to the
extent those provisions would otherwise
apply to the plan).
2. Top-Heavy
Proposed § 1.401(k)-5(f)(2) reflects
the provisions of section 401(k)(15)(B)
(ii), which permit an employer to elect to
exclude all long-term, part-time employ-
ees from the application of the top-heavy
vesting and benefit requirements under
section 416(b) and (c). As explained
in section I.D.2 of this Explanation of
Provisions, the election under proposed
§ 1.401(k)-5(f)(2) would not apply to
former long-term, part-time employ-
ees. In addition, this proposed regula-
tion would clarify that an election under
section 401(k)(15)(B)(ii) does not apply
for purposes of determining whether a
plan is a top-heavy plan (as defined in
section 416(g)).
However, section 125(e) of the
SECURE 2.0 Act amends the special rules
under section 416(g)(4)(H) of the Code for
cash or deferred arrangements using alter-
native methods of meeting nondiscrimina-
tion requirements to provide that the term
“top-heavy plan” does not include a plan
solely because that plan does not provide
nonelective or matching contributions to
employees described in section 401(k)
(15)(B)(i). As explained in section I.E.2
of this Explanation of Provisions, a plan
does not fail to satisfy the ADP safe har-
bor provisions of section 401(k)(12) or
(13) or the ACP safe harbor provisions
of section 401(m)(11) or (12) (including
for purposes of applying section 416(g)
(4)(H) of the Code) merely because the
employer does not make a nonelective or
matching contribution on behalf of an eli-
gible NHCE who is a long-term, part-time
employee, provided that long-term,
part-time employees are excluded for
purposes of determining whether the plan
satisfies those provisions pursuant to an
election that satisfies the requirements of
proposed § 1.401(k)-5(f)(1). Accordingly,
proposed § 1.401(k)-5(f)(2) would clar-
ify that, in the case of an employer that
makes an election described in proposed
§ 1.401(k)-5(f)(1) (which has the effect of
excluding long-term, part-time employ-
ees for purposes of determining whether
the plan satisfies the ADP and ACP safe
harbor provisions), the plan will not fail
to be excluded from the definition of a
“top-heavy plan” under section 416(g)
(4)(H) merely because the employer
does not make nonelective or matching
contributions on behalf of long-term,
part-time employees (or makes nonelec-
tive or matching contributions that do not
satisfy the requirements for safe harbor
contributions).
The employer election regarding
nondiscrimination and coverage testing
under proposed § 1.401(k)-5(f)(1) and the
employer election regarding top-heavy
benefits under proposed § 1.401(k)-5(f)
(2) would be separate elections. In order
for an election to satisfy the conditions
of proposed § 1.401(k)-5(f)(2), the terms
of the plan would be required to pro-
vide that long-term, part-time employees
are excluded from the application of the
vesting and benefit requirements of sec-
tion 416(b) and (c).
3. Additional Employer Contributions
As explained in section I.E of this
Explanation of Provisions, this proposed
regulation generally would not require an
employer to make nonelective or match-
ing contributions on behalf of a long-term,
part-time employee. However, the
Treasury Department and the IRS received
a comment in response to Notice 2020-68
requesting clarification that an employer
may elect under section 401(k)(15)(B)
(i)(II) to exclude long-term, part-time
employees from nondiscrimination and
coverage testing, even if the employer
makes employer contributions (other
than elective contributions) on behalf of
long-term, part-time employees under the
plan.
Under this proposed regulation, an
election to exclude long-term, part-time
employees for purposes of nondiscrim-
ination and coverage testing under pro-
posed § 1.401(k)-5(f)(1), and an election
to exclude long-term, part-time employ-
ees for purposes of top-heavy benefits
under proposed § 1.401(k)-5(f)(2), would
not be conditioned upon long-term,
part-time employees being ineligible to
receive employer contributions other than
elective contributions under the plan.
Accordingly, this proposed regulation
generally would permit the employer or
employers maintaining the plan to elect

December 18, 2023 1570 Bulletin No. 2023–51
to exclude long-term, part-time employ-
ees under proposed § 1.401(k)-5(f)(1)
and (2), even if the employer or employ-
ers maintaining the plan make nonelec-
tive or matching contributions on behalf
of long-term, part-time employees under
the plan. If a plan is intended to satisfy
the ADP safe harbor provisions of sec-
tion 401(k)(12) or (13), or the ACP safe
harbor provisions of section 401(m)(11)
or (12), and the employer elects to exclude
long-term, part-time employees under
proposed § 1.401(k)-5(f)(1) for purposes
of determining whether the plan satisfies
those provisions (and any other provi-
sions under proposed § 1.401(k)-5(f)(1)(i)
that otherwise would apply to the plan),
then any nonelective or matching con-
tributions made on behalf of long-term,
part-time employees under the plan would
not be safe harbor contributions for pur-
poses of § 1.401(k)-3 or 1.401(m)-3
but, as described in section I.F.2 of this
Explanation of Provisions, the plan would
continue to be excluded from the defini-
tion of a “top-heavy plan”.
II. Other Issues
A. Catch-up contributions and Roth
elective contributions
Section 112 of the SECURE Act does
not address whether a long-term, part-time
employee may be a catch-up eligible par-
ticipant for purposes of making catch-up
contributions under section 414(v) and
§ 1.414(v)-1. However, § 1.414(v)-1(g)(3)
provides that an employee is a catch-up
eligible participant for a taxable year
if: (1) the employee is eligible to make
elective deferrals under an applicable
employer plan (without regard to sec-
tion 414(v) or § 1.414(v)-1), and (2) the
employee’s 50th or higher birthday would
occur before the end of the employee’s
taxable year. An employee who is eligi-
ble to participate in a qualified CODA as
a long-term, part-time employee would be
eligible to make elective deferrals under
an applicable employer plan for pur-
poses of § 1.414(v)-1(g)(3). Accordingly,
a long-term, part-time employee is a
catch-up eligible participant for a tax-
able year if the employee’s 50th or higher
birthday would occur before the end of the
employee’s taxable year.
Under the universal availability
requirements of section 414(v)(4) and
§ 1.414(v)-1(e), a section 401(k) plan
(or other applicable employer plan) that
offers catch-up contributions and that
is otherwise subject to section 401(a)
(4) generally will not satisfy the require-
ments of section 401(a)(4) unless all
catch-up eligible participants who par-
ticipate under any applicable employer
plan maintained by the employer are pro-
vided an effective opportunity to make the
same dollar amount of catch-up contri-
butions. This proposed regulation would
not amend the catch-up contribution rules
of § 1.414(v)-1. However, as explained
in section I.F.1 of this Explanation of
Provisions, proposed § 1.401(k)-5(f)
(1) would permit an employer to elect to
exclude long-term, part-time employees
for purposes of certain nondiscrimination
and coverage testing provisions, includ-
ing for purposes of section 401(a)(4).
Therefore, long-term, part-time employ-
ees would be disregarded for purposes of
the universal availability requirements of
section 414(v)(4) and § 1.414(v)-1(e), if
the employer elects to exclude long-term,
part-time employees in accordance with
the provisions of proposed § 1.401(k)-5(f)
(1).
Similarly, section 401(k)(15) does
not address whether a section 401(k)
plan may permit a long-term, part-time
employee to make designated Roth contri-
butions. However, under § 1.401(k)-1(f)
(1), a designated Roth contribution is an
elective contribution under a qualified
CODA that (to the extent permitted under
the plan) satisfies certain conditions.
Section 1.401(k)-1(f)(4) further provides
that a designated Roth contribution must
satisfy the requirements applicable to
elective contributions made under a qual-
ified CODA and is treated as an employer
contribution for purposes of certain
Code sections, including section 401(k).
Accordingly, a section 401(k) plan may
permit long-term, part-time employees to
make designated Roth contributions.
Under § 1.401(k)-1(a)(4)(iv)(B), the
right to make designated Roth contri-
butions is a right or feature subject to
the requirements of section 401(a)(4).
However, if the employer elects to exclude
long-term, part-time employees for pur-
poses of determining whether a plan sat-
isfies section 401(a)(4) in accordance with
the provisions of proposed § 1.401(k)-5(f)
(1), long-term, part-time employees would
be disregarded for purposes of determin-
ing whether the right to make designated
Roth contributions under the plan satisfies
section 401(a)(4) and § 1.401(a)(4)-4.
B. Form 5500 and Form 5500-SF –
Independent qualified public accountant
audit
The Treasury Department and the
IRS received a comment in response to
Notice 2020-68 requesting that long-term,
part-time employees be excluded for
purposes of determining whether a
plan is exempt from the requirement
to be audited annually by an indepen-
dent qualified public accountant (IQPA).
The Treasury Department and the IRS
also received a comment in response to
Notice 2020-68 requesting that the deter-
mination of whether a plan is exempt from
the annual audit requirement be based on
the number of plan participants (includ-
ing long-term, part-time employees) with
account balances as of the beginning of
the plan year, rather than the total num-
ber of participants at the beginning of the
plan year. The annual audit requirement
of section 103(a)(3) of ERISA falls under
the regulatory and interpretive authority
of the Department of Labor and is outside
the scope of this proposed regulation.
5
Proposed Applicability Date
Section 1.401(k)-5 is proposed to
apply to plan years that begin on or
after January 1, 2024. Prior to the date a
Treasury decision revising § 1.401(k)-5 to
5
After these comments were received, revisions were made to the forms and instructions for the Form 5500, “Annual Return/Report of Employee Benefit Plan,” and Form 5500-SF, “Short
Form Annual Return/Report of Small Employee Benefit Plan,” for plan years beginning on or after January 1, 2023. The new instructions provide that only participants with an account bal-
ance are counted for purposes of the small plan audit waiver of annual examination and report of an IQPA under 29 CFR 2520.104-46. See 88 FR 11984 (February 24, 2023).

Bulletin No. 2023–51 1571 December 18, 2023
implement rules for long-term, part-time
employees is published in the Federal
Register, taxpayers may rely on the
rules set forth in this notice of proposed
rulemaking.
Availability of IRS Documents
For copies of recently issued reve-
nue procedures, revenue rulings, notices
and other guidance published in the
Internal Revenue Bulletin, please visit
the IRS website at www.irs.gov or con-
tact the Superintendent of Documents,
U.S. Government Publishing Office,
Washington, DC 20402.
Special Analyses
I. Regulatory Planning and Review
Pursuant to the Memorandum
of Agreement, Review of Treasury
Regulations under Executive Order 12866
(June 9, 2023), tax regulatory actions
issued by the IRS are not subject to the
requirements of section 6 of Executive
Order 12866, as amended. Therefore,
a regulatory impact assessment is not
required.
II. Paperwork Reduction Act
The information required under this
regulation is considered usual and custom-
ary records kept by respondents during
the normal course of business in admin-
istering their retirement plans. These
customary business records impose no
additional burden on respondents and are
not required to be reviewed by the Office
of Management and Budget (OMB) per 5
CFR 1320.3(b)(2).
III. Regulatory Flexibility Act
Pursuant to the Regulatory Flexibility
Act, it is hereby certified that this regula-
tion will not have a significant economic
impact on a substantial number of small
entities. This certification is based on sev-
eral factors. First, the proposed regulation
generally is intended to reflect certain stat-
utory changes that affect section 401(k)
plans. The proposed regulation primarily
would conform the current regulations
under section 401(k) with changes made
by section 112 of the SECURE Act and
sections 125 and 401 of the SECURE 2.0
Act.
Second, although the proposed regu-
lation might affect a substantial number
of small entities, the economic impact of
the proposed regulation is not expected to
be significant. The changes made by sec-
tion 1 12 of the SECURE Act may require
certain small entities that sponsor sec-
tion 401(k) plans to revise the eligibility
service requirements under those plans so
that long-term, part-time employees are
permitted to make cash or deferred elec-
tions. However, except with respect to
SIMPLE 401(k) plans, those small entities
would not be required to make nonelec-
tive or matching contributions on behalf
of long-term, part-time employees. Any
additional recordkeeping or administra-
tive costs resulting from the participation
of long-term, part-time employees in sec-
tion 401(k) plans sponsored by small enti-
ties are not expected to be significant.
With respect to small entities that spon-
sor SIMPLE 401(k) plans, the proposed
regulation would require those small
entities to make nonelective or matching
contributions under those SIMPLE 401(k)
plans on behalf of any long-term, part-time
employees in order to satisfy section 112
of the SECURE Act. However, if a small
entity sponsors a section 401(k) plan, it is
expected that the plan typically would be
subject to the ADP test or designed to sat-
isfy the requirements for a safe harbor sec-
tion 401(k) plan, rather than be designed
to satisfy the requirements for a SIMPLE
401(k) plan. Accordingly, the number of
small entities that sponsor section 401(k)
plans that are intended to satisfy the
requirements for a SIMPLE 401(k) plan
and are affected by the expanded partic-
ipation requirements of section 112 of
the SECURE Act is not expected to be
substantial.
For the reasons stated, a regulatory
flexibility analysis under the Regulatory
Flexibility Act is not required. The
Treasury Department and the IRS invite
comments on the impact of this regula-
tion on small entities. Pursuant to sec-
tion 7805(f) of the Code, this notice of
proposed rulemaking has been submitted
to the Chief Counsel of Advocacy of the
Small Business Administration for com-
ment on its impact on small business.
IV. Unfunded Mandates Reform Act
Section 202 of the Unfunded Mandates
Reform Act of 1995 requires that agencies
assess anticipated costs and benefits and
take certain other actions before issuing a
final rule that includes any Federal man-
date that may result in expenditures in any
one year by a State, local, or Tribal gov-
ernment, in the aggregate, or by the private
sector, of $100 million in 1995 dollars,
updated annually for inflation. The pro-
posed regulation does not propose any rule
that would include any Federal mandate
that may result in expenditures by State,
local, or Tribal governments, or by the pri-
vate sector in excess of that threshold.
V. Executive Order 13132: Federalism
Executive Order 13132 (Federalism)
prohibits an agency from publishing any
rule that has federalism implications if
the rule either imposes substantial, direct
compliance costs on State and local gov-
ernments, and is not required by statute,
or preempts State law, unless the agency
meets the consultation and funding
requirements of section 6 of the Executive
order. The proposed regulation does not
propose any rule that would have feder-
alism implications, impose substantial
direct compliance costs on State and local
governments, or preempt State law within
the meaning of the Executive order.
Comments and Public Hearing
Before a final regulation is adopted with
respect to long-term, part-time employee
rules for cash or deferred arrangements
under § 1.401(k)-5, consideration will be
given to comments regarding the notice of
proposed rulemaking that are submitted
timely to the IRS as prescribed in the pre-
amble under the ADDRESSES section.
The Treasury Department and the IRS
request comments on all aspects of the
proposed regulation. As described in sec-
tion I.B.1 of the Explanation of Provisions,
comments specifically are requested
on the application of section 112 of the
SECURE Act to a qualified CODA that is
included in either (1) a governmental plan,
or (2) a church plan with respect to which
the election provided by section 410(d)
has not been made.

December 18, 2023 1572 Bulletin No. 2023–51
All comments will be made available
at www.regulations.gov or upon request.
Once submitted to the Federal eRulemak-
ing Portal, comments cannot be edited or
withdrawn.
A public hearing has been scheduled
for March 15, 2024, beginning at 10:00
a.m. ET in the Auditorium of the Internal
Revenue Building, 1111 Constitution
Avenue NW, Washington, DC. Due to
building security procedures, visitors must
enter at the Constitution Avenue entrance.
In addition, all visitors must present photo
identification to enter the building. Because
of access restrictions, visitors will not be
admitted beyond the immediate entrance
area more than 30 minutes before the hear-
ing starts. Participants may alternatively
attend the public hearing by telephone.
The rules of 26 CFR 601.601(a)(3)
apply to the hearing. Persons who wish
to present oral comments must submit an
outline of the topics to be addressed and
the time to be devoted to each topic by
January 26, 2024 as prescribed in the pre-
amble under the ADDRESSES section.
A period of 10 minutes will be allocated
to each person for making comments. An
agenda showing the scheduling of the
speakers will be prepared after the dead-
line for receiving outlines has passed.
Copies of the agenda will be available free
of charge at the hearing. If no outline of
the topics to be discussed at the hearing
is received by January 26, 2024, the pub-
lic hearing will be cancelled. If the public
hearing is cancelled, a notice of cancel-
lation of the public hearing will be pub-
lished in the Federal Register.
Individuals who want to testify in per-
son at the public hearing must send an
email to publichearings@irs.gov to have
your name added to the building access list.
The subject line of the email must contain
the regulation number REG-104194-23
and the language TESTIFY In Person.
For example, the subject line may say:
Request to TESTIFY In Person at Hearing
for REG-104194-23.
Individuals who want to testify by
telephone at the public hearing must
send an email to publichearings@irs.
gov to receive the telephone number and
access code for the hearing. The subject
line of the email must contain the regu-
lation number REG-104194-23 and the
language TESTIFY Telephonically. For
example, the subject line may say: Request
to TESTIFY Telephonically at Hearing for
REG-104194-23.
Individuals who want to attend the
public hearing in person without testify-
ing must also send an email to publichear-
ings@irs.gov to have your name added to
the building access list. The subject line
of the email must contain the regulation
number REG-104194-23 and the language
ATTEND In Person. For example, the
subject line may say: Request to ATTEND
Hearing In Person for REG-104194-23.
Requests to attend the public hearing must
be received by 5:00 p.m. ET on March 13,
2024.
Individuals who want to attend the pub-
lic hearing by telephone without testifying
must also send an email to publichear-
ings@irs.gov to receive the telephone
number and access code for the hearing.
The subject line of the email must contain
the regulation number REG-104194-23
and the language ATTEND Hearing
Telephonically. For example, the subject
line may say: Request to ATTEND Hearing
Telephonically for REG-104194-23.
Requests to attend the public hearing must
be received by 5:00 p.m. ET on March 13,
2024.
Hearings will be made accessible to
people with disabilities. To request spe-
cial assistance during the hearing, please
contact the Publications and Regulations
Branch of the Office of Associate Chief
Counsel (Procedure and Administration)
by sending an email to publichearings@
irs.gov (preferred) or by telephone at
(202) 317-6901 (not a toll-free number)
by March 12, 2024.
Drafting Information
The principal authors of this regula-
tion are Kara M. Soderstrom and Jason
E. Levine, Office of Associate Chief
Counsel (Employee Benefits, Exempt
Organizations, and Employment Taxes
(EEE)). However, other personnel from
the IRS and the Treasury Department
participated in the development of this
regulation.
List of Subjects in 26 CFR Part 1
Income taxes, Reporting and record-
keeping requirements.
Proposed Amendments to the
Regulations
Accordingly, the Treasury Department
and the IRS propose to amend 26 CFR
part 1 as follows:
PART 1—INCOME TAXES
Paragraph 1. The authority citation
for part 1 is amended by adding an entry
for § 1.401(k)-5 in numerical order to read
in part as follows:
Authority: 26 U.S.C. 7805 * * *
* * * * *
Section 1.401(k)-5 is also issued under
26 U.S.C. 401(m)(9).
* * * * *
Par. 2. Section 1.401(k)-5 is revised to
read as follows:
§ 1.401(k)-5 Long-term, part-time
employees.
(a) Overview—(1) Rules applicable to
long-term, part-time employees—(i) In
general. This section provides rules regard-
ing long-term, part-time employees, as
defined in paragraph (b)(1) of this section.
A cash or deferred arrangement satisfies the
requirements of section 401(k)(2)(D) of the
Internal Revenue Code only if, with respect
to each long-term, part-time employee—
(A) The employee becomes eligible to
make a cash or deferred election under the
arrangement in accordance with the par-
ticipation requirements of paragraph (c) of
this section; and
(B) The plan that includes the arrange-
ment satisfies the vesting requirements of
paragraph (d) of this section.
(ii) Optional provisions. A plan that
includes a cash or deferred arrangement
that satisfies the requirements of para-
graphs (c) and (d) of this section may
reflect the nonelective and matching
contribution provisions of paragraph (e)
of this section with respect to long-term,
part-time employees (but not former
long-term, part-time employees as defined
in paragraph (d)(2)(i) of this section). In
addition, an employer maintaining the
plan may apply the employer election
provisions of paragraph (f) of this sec-
tion with respect to long-term, part-time
employees (but not former long-term,
part-time employees).

Bulletin No. 2023–51 1573 December 18, 2023
(2) Rules applicable to former
long-term, part-time employees. See
paragraph (d)(2) of this section for rules
relating to former long-term, part-time
employees.
(b) Long-term, part-time employees—
(1) Definition—(i) In general. Except
as provided in paragraph (b)(1)(ii) or
(iii) of this section, long-term, part-time
employee means an employee who is eli-
gible to participate in the arrangement
solely by reason of having—
(A) Completed two consecutive
12-month periods during each of which
the employee is credited with at least
500 hours of service (as defined in sec-
tion 410(a)(3)(C)); and
(B) Attained the age specified in sec-
tion 410(a)(1)(A)(i) by the close of the last
of the 12-month periods described in para-
graph (b)(1)(i)(A) of this section.
(ii) Exclusion for certain employees.
Long-term, part-time employees do not
include—
(A) Employees who are included in a
unit of employees covered by an agree-
ment that the Secretary of Labor finds
to be a collective bargaining agreement
between employee representatives and
one or more employers if there is evi-
dence that retirement benefits were the
subject of good faith bargaining between
those employee representatives and that
employer or employers;
(B) Employees who are nonresident
aliens and who receive no earned income
(within the meaning of section 911(d)(2))
from the employer that constitutes income
from sources within the United States
(within the meaning of section 861(a)(3));
or
(C) Any other employees described in
section 410(b)(3).
(iii) Plan years beginning in 2024. With
respect to a plan year beginning in 2024,
paragraph (b)(1)(i)(A) of this section is
applied by substituting three consecutive
12-month periods for two consecutive
12-month periods.
(2) Examples. The following exam-
ples illustrate the application of the defi-
nition of long-term, part-time employee
under paragraph (b)(1) of this section,
taking into account the determination of
12-month periods under paragraph (c)
(2)(i) of this section. For purposes of the
examples, each plan is maintained on a
calendar-year basis, includes a cash or
deferred arrangement, and each plan’s
provisions are effective as of January 1,
2024. For purposes of paragraphs (b)(2)
(vi) through (xii) of this section (Examples
6 through 12), each plan provides that,
in order to be eligible to make a cash or
deferred election under the arrangement,
an employee is required to complete a
period of service with the employer main-
taining the plan that extends until the close
of the earlier of: a 12-month period during
which the employee is credited with at
least 1,000 hours of service, or three con-
secutive 12-month periods (excluding
any 12-month period beginning before
January 1, 2021) during each of which
the employee is credited with at least
500 hours of service (however, effective
January 1, 2025, each plan is amended
to provide that the applicable number of
consecutive 12-month periods during
each of which an employee must be cred-
ited with at least 500 hours of service in
order to participate in the arrangement is
reduced from three to two). In addition,
for purposes of paragraphs (b)(2)(vi)
through (xii) of this section (Examples
6 through 12), each plan provides that,
for purposes of determining whether an
employee has satisfied the requirements
of paragraph (b)(1)(i) of this section,
12-month periods are determined by ref-
erence to the employment commencement
date of an employee, and each plan pro-
vides monthly entry dates for an eligible
employee to commence participation in
the arrangement. Except as provided in
paragraphs (b)(2)(viii), (ix), and (x) of
this section (Examples 8, 9, and 10), each
employee has attained age 21. Except as
provided in paragraphs (b)(2)(xi) and (xii)
of this section (Examples 11 and 12), none
of the employees are described in sec-
tion 410(b)(3).
(i) Example 1. (A) Employer A maintains Plan I.
Plan I includes a cash or deferred arrangement under
which each employee of Employer A is eligible to
make a cash or deferred election as soon as admin-
istratively practicable after the employee’s employ-
ment commencement date.
(B) None of the employees who are eligible to
make a cash or deferred election under the arrange-
ment in Plan I are long-term, part-time employees
because none of those employees are eligible to par-
ticipate in the arrangement solely by reason of hav-
ing completed the number of consecutive 12-month
periods that applies under paragraph (b)(1)(i)(A) or
(b)(1)(iii) of this section (referred to as the applicable
number of consecutive 12-month periods) during
each of which the employee is credited with at least
500 hours of service.
(ii) Example 2. (A) Employer B maintains Plan J.
Plan J provides that, in order to be eligible to make
a cash or deferred election under the arrangement,
each employee of Employer B is required to com-
plete a 12-month period of service with Employer B
during which the employee is credited with at least
500 hours of service.
(B) None of the employees who are eligible to
make a cash or deferred election under the arrange-
ment in Plan J are long-term, part-time employees
because none of those employees are eligible to par-
ticipate in the arrangement solely by reason of hav-
ing completed the applicable number of consecutive
12-month periods during each of which the employee
is credited with at least 500 hours of service.
(iii) Example 3. (A) Employer C maintains Plan
K. Plan K provides that, in order to be eligible to
make a cash or deferred election under the arrange-
ment, each employee of Employer C is required to
complete a period of service with Employer C that
extends until the close of the earlier of: a 12-month
period during which the employee is credited with
at least 1,000 hours of service, or two consecu-
tive 12-month periods during each of which the
employee is credited with at least 500 hours of
service.
(B) For the plan year beginning January 1, 2024,
none of the employees who are eligible to make a
cash or deferred election under the arrangement in
Plan K are long-term, part-time employees because
none of those employees are eligible to participate
in the arrangement solely by reason of having com-
pleted three consecutive 12-month periods during
each of which the employee is credited with at least
500 hours of service.
(C) For plan years beginning on or after January
1, 2025, an employee who becomes eligible to par-
ticipate in the arrangement in Plan K solely by rea-
son of having completed two consecutive 12-month
periods during each of which the employee is
credited with at least 500 hours of service would
be a long-term, part-time employee. However, an
employee who became eligible to participate in
the arrangement before January 1, 2025, would not
be a long-term, part-time employee for plan years
beginning on or after January 1, 2025, because that
employee did not become eligible to participate in
the arrangement solely by reason of completing the
applicable number of consecutive 12-month periods
during each of which the employee is credited with
at least 500 hours of service.
(iv) Example 4. (A) Employer D maintains Plan
L. Plan L provides that, in order to be eligible to
make a cash or deferred election under the arrange-
ment, each employee of Employer D is required to
complete a 1-year period of service with Employer
D using the elapsed time method of crediting service.
(B) None of the employees who are eligible to
make a cash or deferred election under the arrange-
ment in Plan L are long-term, part-time employees
because none of those employees are eligible to par-
ticipate in the arrangement solely by reason of hav-
ing completed the applicable number of consecutive
12-month periods during each of which the employee
is credited with at least 500 hours of service.

December 18, 2023 1574 Bulletin No. 2023–51
(v) Example 5. (A) The facts are the same as in
paragraph (b)(2)(iv)(A) of this section (Example 4),
except that Plan L requires employees of Employer
D who are classified as part-time employees to com-
plete the applicable number of consecutive 1-year
periods of service under paragraph (b)(1)(i)(A) or
(b)(1)(iii) of this section with Employer D using the
elapsed time method of crediting service.
(B) Plan L fails to satisfy the requirements of sec-
tion 401(k)(2)(D)(i) because, under the elapsed time
method of crediting service, a 1-year period of ser-
vice is the maximum period that Plan L may require
any employee to complete in order to participate in
the arrangement.
(vi) Example 6. (A) Employer E maintains Plan
M. For purposes of determining the eligibility of an
employee to participate in the arrangement under
Plan M, Plan M credits an employee with 190 hours
of service for each month for which the employee
would be required to be credited with at least 1
hour of service. Employees R and S are employ-
ees of Employer E who both have an employment
commencement date of June 1, 2024. Employees R
and S are both classified by Employer E as part-time
employees. During the 12-month period beginning
on June 1, 2024, Employee R has at least 1 hour of
service each month for 6 months and, therefore, is
credited with 1,140 hours of service. Employee R
commences participation in the arrangement in Plan
M on June 1, 2025. During each of the 12-month
periods beginning on June 1, 2024, and June 1, 2025,
Employee S is credited with at least 1 hour of service
each month for 4 months and, therefore, is credited
with 760 hours of service for the period. Employee S
commences participation in the arrangement in Plan
M on June 1, 2026.
(B) Employee R is not a long-term, part-time
employee (or former long-term, part-time employee,
as defined in paragraph (d)(2)(i) of this section)
because Employee R is credited with 1,140 hours
of service during the 12-month period beginning
on June 1, 2024. Therefore, Employee R is not eli-
gible to participate in the arrangement solely by
reason of having completed the applicable number
of consecutive 12-month periods during each of
which the employee is credited with at least 500
hours of service. However, Employee S is eligible
to participate in the arrangement solely by reason
of having completed the applicable number of con-
secutive 12-month periods during each of which
the employee is credited with at least 500 hours of
service. Accordingly, Employee S is a long-term,
part-time employee.
(vii) Example 7. (A) Employer G maintains
Plan O. Employee U is an employee of Employer G
with an employment commencement date of June 1,
2024. Employee U is classified by Employer G as
a part-time employee. During the 12-month period
beginning on June 1, 2024, Employee U is credited
with 900 hours of service. During the 12-month
period beginning on June 1, 2025, Employee U is
credited with 1,100 hours of service. Employee U
commences participation in the arrangement in Plan
O on June 1, 2026. During the 12-month period
beginning on June 1, 2026, Employee U is credited
with 900 hours of service.
(B) Employee U is not a long-term, part-time
employee (or former long-term, part-time employee)
because Employee U is credited with 1,100 hours
of service during the 12-month period beginning on
June 1, 2025. Therefore, Employee U is not eligible
to participate in the arrangement solely by reason
of having completed the applicable number of con-
secutive 12-month periods during each of which the
employee is credited with at least 500 hours of ser-
vice. The result would be the same even if Employee
U also is credited with at least 500 (but less than
1,000) hours of service during the plan year begin-
ning on June 1, 2027 (and therefore completes two
consecutive 12-month periods during each of which
the employee is credited with at least 500 hours of
service).
(viii) Example 8. (A) Employer H maintains Plan
P. Plan P excludes any employees who have not yet
attained age 21 from participating in the arrangement
under Plan P. Employee V is an employee of Employer
H with an employment commencement date of June 1,
2024, who attains age 18 on September 2, 2024.
During the 12-month period beginning on June 1,
2024, Employee V is credited with 1,100 hours of
service. During each of the 12-month periods begin-
ning on June 1, 2025, and June 1, 2026, Employee V
is credited with 600 hours of service. On September 2,
2027, Employee V attains age 21 and Employee V
commences participation in the arrangement in Plan
P on October 1, 2027.
(B) Employee V is not a long-term, part-time
employee (or former long-term, part-time employee)
because Employee V was credited with 1,100 hours
of service during the 12-month period beginning on
June 1, 2024, and, therefore, became eligible to par-
ticipate in the arrangement by reason of completing a
12-month period with at least 1,000 hours of service
and attaining age 21. Accordingly, Employee V did
not become eligible to participate in the arrangement
solely by reason of having completed the applicable
number of consecutive 12-month periods during
each of which the employee is credited with at least
500 hours of service.
(ix) Example 9. (A) Employer I maintains Plan
Q. Plan Q excludes any employees who have not yet
attained age 21 from participating in the arrange-
ment under Plan Q. Employee W is an employee
of Employer I with an employment commence-
ment date of June 1, 2024, who attains age 19 on
October 3, 2024. During each of the 12-month peri-
ods beginning on June 1, 2024, and June 1, 2025,
Employee W is credited with 600 hours of service
for the period. During the 12-month period begin-
ning on June 1, 2026, Employee W attains age 21
(on October 3, 2026), but is credited with only 400
hours of service.
(B) Employee W is not a long-term, part-time
employee (or former long-term, part-time employee)
because Employee W is credited with only 400 hours
of service during the 12-month period in which
Employee W attains age 21. Therefore, Employee W
did not attain age 21 by the close of the last of the
12-month periods described in paragraph (b)(1)(i)
(A) of this section. However, Employee W could
become eligible to participate in the arrangement
in Plan Q as a long-term, part-time employee as of
June 1, 2029, if Employee W is credited with at least
500 (but less than 1,000) hours of service for each
12-month period beginning on June 1, 2027, and
June 1, 2028.
(x) Example 10. (A) The facts are the same as
in paragraph (b)(2)(ix)(A) of this section (Example
9), except that, during the 12-month period begin-
ning on June 1, 2026, Employee W is credited with
600 hours of service, and Employee W commences
participation in the arrangement in Plan Q on June 1,
2027.
(B) Employee W is credited with 600 hours of
service for each 12-month period beginning on
June 1, 2025, and June 1, 2026, and attains age 21 on
October 3, 2026, which is by the close of the last of
those 12-month periods. Accordingly, Employee W
is a long-term, part-time employee.
(xi) Example 11. (A) Employer J maintains Plan
R. Plan R excludes any employees who are included
in a unit of employees covered by a collective bar-
gaining agreement described in paragraph (b)(1)(ii)
(A) of this section from participating in the arrange-
ment under Plan R. Employee X is an employee of
Employer J who is included in a unit of employ-
ees covered by a collective bargaining agreement
described in paragraph (b)(1)(ii)(A) of this section,
and who has an employment commencement date
of June 1, 2024. During each of the 12-month peri-
ods beginning on June 1, 2024, and June 1, 2025,
Employee X is credited with 600 hours of service for
the period. During the 12-month period beginning
on June 1, 2026, Employee X is credited with 1,100
hours of service. On June 2, 2027, Employee X
ceases to be included in a unit of employees covered
by a collective bargaining agreement described in
paragraph (b)(1)(ii)(A) of this section and becomes
eligible to participate in the arrangement.
(B) Employee X is not a long-term, part-time
employee (or former long-term, part-time employee)
because Employee X is credited with 1,100 hours
of service during the 12-month period beginning on
June 1, 2026. Therefore, Employee X is not eligi-
ble to participate in the arrangement solely by rea-
son of having completed the applicable number of
consecutive 12-month periods during each of which
the employee is credited with at least 500 hours of
service.
(xii) Example 12. (A) The facts are the same as in
paragraph (b)(2)(xi)(A) of this section (Example 11),
except that, during the 12-month period beginning
on June 1, 2026, Employee X is credited with only
600 hours of service.
(B) Employee X is eligible to participate in the
arrangement solely by reason of having completed
the applicable number of consecutive 12-month
periods during each of which the employee is cred-
ited with at least 500 hours of service. Accordingly,
Employee X is a long-term, part-time employee.
(c) Participation—(1) Time of partici-
pation—(i) In general. Subject to the rules
of this paragraph (c)(1) and paragraph (c)
(4) of this section, a long-term, part-time
employee who satisfies the plan’s eligibil-
ity conditions (as described in paragraph
(c)(3) of this section) must become eli-
gible to make a cash or deferred election
under the arrangement no later than the
earlier of—
(A) The first day of the first plan year
beginning after the date on which the

Bulletin No. 2023–51 1575 December 18, 2023
long-term, part-time employee satisfied
the requirements of paragraphs (b)(1)(i)
(A) and (B) of this section; or
(B) The date 6 months after the date on
which the long-term, part-time employee
satisfied the requirements of paragraphs
(b)(1)(i)(A) and (B) of this section.
(ii) Employees who separate from ser-
vice. The requirements of paragraph (c)
(1)(i) of this section do not apply to a
long-term, part-time employee who sep-
arates from service and does not return
to service with the employer or employ-
ers maintaining the plan before the date
referred to in paragraph (c)(1)(i) of this
section. However, if a long-term, part-time
employee described in the prior sentence
returns to service with the employer or
employers maintaining the plan after
the date referred to in paragraph (c)(1)
(i) of this section and is otherwise eligi-
ble to participate in the arrangement, the
long-term, part-time employee must be
eligible to make a cash or deferred elec-
tion immediately upon return to service
with the employer or employers maintain-
ing the plan.
(iii) Change in status. If an employee
who would otherwise be eligible to par-
ticipate in the arrangement as a long-term,
part-time employee does not participate
solely because the employee does not sat-
isfy the plan’s eligibility conditions (as
described in paragraph (c)(3) of this sec-
tion) as of the date referred to in paragraph
(c)(1)(i) of this section, and the employee
satisfies those conditions after that date,
the employee must become eligible to par-
ticipate in the arrangement immediately
upon satisfying those conditions.
(2) Determination of 12-month peri-
ods—(i) In general. Except for any
12-month period beginning before
January 1, 2021, all 12-month periods
during which an employee is credited
with at least 500 hours of service with
the employer or employers maintain-
ing the plan must be taken into account
for purposes of determining whether an
employee has satisfied the requirements
of paragraphs (b)(1)(i)(A) and (B) of this
section.
(ii)
Initial and subsequent 12-month
periods. (A) The initial 12-month period
with respect to an employee begins on the
first day for which the employee is entitled
to be credited with an hour of service.
(B) Beginning with the plan year that
commences within the initial 12-month
period described in paragraph (c)(2)(ii)
(A) of this section, 12-month periods may
be determined by reference to the first day
of the plan year. If the preceding sentence
applies, that initial 12-month period and
the plan year that commences within the
initial 12-month period are treated as con-
secutive 12-month periods.
(iii) Examples. The following exam-
ples illustrate the determination of
12-month periods under this paragraph (c)
(2). For purposes of the examples, each
plan includes a cash or deferred arrange-
ment, is maintained on a calendar-year
basis, and provides monthly entry dates
for an eligible employee to commence
participation in the arrangement. Each
employee in the following examples has
attained age 21, and none of the employ-
ees are described in section 410(b)(3). For
purposes of paragraphs (c)(2)(iii)(A), (B),
and (G) of this section (Examples 1, 2, and
7), each plan provides that, for purposes
of determining whether an employee
has satisfied the requirements of para-
graphs (b)(1)(i)(A) and (B) of this sec-
tion, 12-month periods are determined by
reference to the employment commence-
ment date of an employee. For purposes
of paragraphs (c)(2)(iii)(C) through (F) of
this section (Examples 3 through 6), each
plan provides that, for purposes of deter-
mining whether an employee has satisfied
the requirements of paragraphs (b)(1)(i)
(A) and (B) of this section, any 12-month
period that begins after the first day of the
initial 12-month period is determined by
reference to the first day of the plan year.
For purposes of paragraph (c)(2)(iii)(A)
of this section and paragraphs (c)(2)(iii)
(C) through (G) of this section (Example
1 and Examples 3 through 7), each plan
provides that, effective January 1, 2024,
in order to be eligible to make a cash or
deferred election under the arrangement,
each employee is required to complete a
period of service with the employer main-
taining the plan that extends until the close
of the earlier of: a 12-month period during
which the employee is credited with at
least 1,000 hours of service, or three con-
secutive 12-month periods (excluding
any 12-month period beginning before
January 1, 2021) during each of which
the employee is credited with at least
500 hours of service. However, effective
January 1, 2025, each plan is amended to
provide that the applicable number of con-
secutive 12-month periods during each of
which an employee must be credited with
at least 500 hours of service in order to
participate in the arrangement is reduced
from three to two.
(A) Example 1. (1) Employer K maintains Plan
S. Pursuant to paragraph (c)(2)(i) of this section,
Plan S provides that any 12-month period beginning
before January 1, 2021, is not taken into account
for purposes of determining whether an employee
has completed three consecutive 12-month peri-
ods during each of which the employee is credited
with at least 500 hours of service. Employee Y is an
employee of Employer K with an employment com-
mencement date of June 1, 2021. During each of the
12-month periods beginning on June 1, 2021, June 1,
2022, and June 1, 2023, Employee Y is credited with
600 hours of service for the period. Employee Y
commences participation in the arrangement in Plan
S on June 1, 2024.
(2) Employee Y is eligible to participate in the
arrangement solely by reason of having completed
three consecutive 12-month periods during each of
which the employee is credited with at least 500
hours of service, and Employee Y is a long-term,
part-time employee. If Employee Y had an employ-
ment commencement date of June 1, 2020, and
had been credited with 600 hours of service for the
12-month period beginning on June 1, 2020, then the
result would be the same because, under the terms of
the plan, the 12-month period beginning on June 1,
2020, would not be taken into account for purposes
of determining whether Employee Y has completed
three consecutive 12-month periods during each of
which the employee is credited with at least 500
hours of service and, therefore, Employee Y would
become eligible to participate in the arrangement on
June 1, 2024, as a long-term, part-time employee.
(B) Example 2. (1) Employer L maintains Plan T.
Plan T provides that, in order to be eligible to make
a cash or deferred election under the arrangement,
each employee is required to complete a period of
service with Employer L that extends until the close
of the earlier of: a 12-month period during which
the employee is credited with at least 1,000 hours
of service; or the number of consecutive 12-month
periods that applies under paragraph (b)(1)(i)(A) or
(b)(1)(iii) of this section (referred to as the applicable
number of consecutive 12-month periods), including
12-month periods beginning before January 1, 2021.
Employee Z is an employee of Employer L with an
employment commencement date of June 1, 2020.
During each of the 12-month periods beginning
on June 1, 2020, June 1, 2021, and June 1, 2022,
Employee Z is credited with 600 hours of service for
the period. Employee Z commences participation in
the arrangement in Plan T on June 1, 2023.
(2) Plan T does not fail to satisfy the require-
ments of section 401(k)(2)(D) merely because, under
the terms of Plan T, Employee Z commences partici-
pation in the arrangement on June 1, 2023. However,
paragraph (c)(2)(i) of this section does not permit
any 12-month period beginning before January 1,
2021 (including the 12-month period beginning on

December 18, 2023 1576 Bulletin No. 2023–51
June 1, 2020), to be taken into account for purposes
of determining whether an employee has completed
the applicable number of consecutive 12-month
periods during each of which the employee is cred-
ited with at least 500 hours of service. Accordingly,
Employee Z is not a long-term, part-time employee
because Employee Z is not eligible to participate
in the arrangement solely by reason of having
completed the applicable number of consecutive
12-month periods (beginning on or after January 1,
2021) during each of which the employee is credited
with at least 500 hours of service.
(C) Example 3. (1) Employer M maintains Plan
U. Employee A is an employee of Employer M with
an employment commencement date of March 1,
2023. During the 12-month period beginning on
March 1, 2023, Employee A is credited with 400
hours of service. During each of the 12-month peri-
ods beginning on January 1, 2024, and January 1,
2025, Employee A is credited with 600 hours of ser-
vice for the period. Employee A commences partici-
pation in the arrangement under Plan U on January 1,
2026.
(2) Plan U satisfies the requirements of para-
graph (c)(2)(ii)(B) of this section with respect to
Employee A. The fact that the 12-month period
beginning March 1, 2023, is not a 12-month period
for which Employee A is credited with at least
500 hours of service, does not prevent Employee
A from being a long-term, part-time employee.
Accordingly, Employee A is eligible to participate in
the arrangement on January 1, 2026, solely by rea-
son of having completed two consecutive 12-month
periods during each of which the employee is
credited with at least 500 hours of service (that
is, the 12-month periods beginning on January 1,
2024, and January 1, 2025), and Employee A is a
long-term, part-time employee.
(D) Example 4. (1) Employer N maintains Plan
V. Employee B is an employee of Employer N with
an employment commencement date of December 1,
2023. During the 12-month period beginning on
December 1, 2023, Employee B is credited with 600
hours of service. During the 12-month period begin-
ning on January 1, 2024, Employee B is credited
with 600 hours of service. Employee B commences
participation in the arrangement under Plan V on
January 1, 2025.
(2) Plan V satisfies the requirements of para-
graph (c)(2)(ii)(B) of this section with respect to
Employee B because the 12-month periods begin-
ning on December 1, 2023, and January 1, 2024,
are considered two consecutive 12-month periods.
Accordingly, Employee B is eligible to participate in
the arrangement on January 1, 2025, solely by reason
of having completed two consecutive 12-month peri-
ods during each of which the employee is credited
with at least 500 hours of service, and Employee B is
a long-term, part-time employee.
(E) Example 5. (1) Employer O maintains Plan
W. Employee C is an employee of Employer O with
an employment commencement date of August 1,
2020. During the 12-month period beginning on
August 1, 2020, Employee C is credited with 600
hours of service. During each of the 12-month peri-
ods beginning on January 1, 2021, January 1, 2022,
and January 1, 2023, Employee C is credited with
600 hours of service for the period. Employee C
commences participation in the arrangement in Plan
W on January 1, 2024.
(2) Plan W satisfies the requirements of para-
graph (c)(2)(ii)(B) of this section with respect to
Employee C. Pursuant to paragraph (c)(2)(i) of
this section, Plan W does not take into account the
12-month beginning on August 1, 2020, for purposes
of determining whether Employee C has completed
three consecutive 12-month periods during each of
which the employee is credited with at least 500
hours of service. Accordingly, Employee C is eligi-
ble to participate in the arrangement on January 1,
2024, solely by reason of having completed three
consecutive 12-month periods during each of which
the employee is credited with at least 500 hours of
service (that is, the 12-month periods beginning on
January 1, 2021, January 1, 2022, and January 1,
2023), and Employee C is a long-term, part-time
employee.
(F) Example 6. (1) Employer P maintains Plan X.
Employee D is an employee of Employer P with an
employment commencement date of March 1, 2023.
During the 12-month period beginning on March 1,
2023, Employee D is credited with 600 hours of
service. During the 12-month period beginning on
January 1, 2024, Employee D is credited with 400
hours of service. During each of the 12-month peri-
ods beginning on January 1, 2025, and January 1,
2026, Employee D is credited with 600 hours of ser-
vice for the period. Employee D commences partici-
pation in the arrangement under Plan X on January 1,
2027.
(2) Plan X satisfies the requirements of paragraph
(c)(2)(ii)(B) of this section with respect to Employee
D. The 12-month period beginning on March 1, 2023
(for which Employee D is credited with 600 hours
of service) is not taken into account for purposes of
determining whether Employee D has completed the
applicable number of consecutive 12-month periods
during each of which the employee is credited with
at least 500 hours of service because Employee D is
not credited with at least 500 hours of service during
the 12-month period beginning on January 1, 2024.
Accordingly, Employee D is eligible to participate in
the arrangement on January 1, 2027, solely by rea-
son of having completed two consecutive 12-month
periods during each of which the employee is cred-
ited with at least 500 hours of service (that is, the
12-month periods beginning on January 1, 2025, and
January 1, 2026), and Employee D is a long-term,
part-time employee.
(G) Example 7. (1) Employer Q maintains Plan
Y. Employee E is an employee of Employer Q with
an employment commencement date of June 1,
2023. During each of the 12-month periods begin-
ning on June 1, 2023, and June 1, 2024, Employee E
is credited with 600 hours of service for the period.
Employee E commences participation in the arrange-
ment in Plan Y on June 1, 2025. During the 12-month
period beginning on June 1, 2025, Employee E is
credited with 300 hours of service.
(2) Pursuant to paragraph (c)(2)(i) of this section,
the 12-month periods beginning on June 1, 2023, and
June 1, 2024, must be taken into account for purposes
of determining whether Employee E is a long-term,
part-time employee. This requirement is not changed
merely because Employee E is not credited with at
least 500 hours of service during the 12-month period
beginning on June 1, 2025. Accordingly, Employee E
does not cease to be a long-term, part-time employee
merely because Employee E completes a 12-month
period during which Employee E is credited with
less than 500 hours of service.
(3) Eligibility conditions not based on
age or service—(i) In general. Subject
to paragraph (c)(3)(ii) of this section, the
rules of this section do not preclude a
plan from establishing an eligibility con-
dition that must be satisfied in order for
an employee to participate in the arrange-
ment (for example, requiring as a condi-
tion of participation that an employee be
employed within a specified job classifi-
cation), provided that the condition is not
a proxy for imposing an age or service
requirement that requires an employee
to complete a period of service with the
employer or employers maintaining the
plan that extends beyond the close of the
earlier of the periods described in sec-
tion 401(k)(2)(D)(i) and (ii).
(ii) Eligibility conditions that are prox-
ies for age or service. For purposes of
applying the rules of this section, a plan
provision will be treated as a proxy for
imposing an age or service requirement
if the provision has the effect of impos-
ing an age or service requirement with the
employer or employers maintaining the
plan.
(iii) Examples. The following exam-
ples illustrate the rules of this paragraph
(c)(3). For purposes of the examples, each
plan includes a cash or deferred arrange-
ment and is maintained on a calendar-year
basis.
(A) Example 1. (1) Employer R maintains Plans
Z and A. Effective January 1, 2024, Plan Z provides
that, as a condition to participate in the arrangement,
an employee must complete the number of consecu-
tive 12-month periods that applies under paragraph
(b)(1)(i)(A) or (b)(1)(iii) of this section (referred to
as the applicable number of consecutive 12-month
periods) during each of which the employee is cred-
ited with at least 500 hours of service. Effective
January 1, 2024, Plan A provides that, as a condi-
tion to participate in the arrangement, an employee
must complete a 12-month period during which the
employee is credited with at least 1,000 hours of
service.
(2) Because the provision of Plan Z that requires
an employee to complete the applicable number of
consecutive 12-month periods during each of which
the employee is credited with at least 500 hours of
service in order to participate in the arrangement
requires an employee to complete the period of ser-
vice described in section 401(k)(2)(D)(ii), that pro-
vision requires an employee to complete a period
of service with Employer R that extends beyond
the close of the earlier of the period described in

Bulletin No. 2023–51 1577 December 18, 2023
section 401(k)(2)(D)(i), or the period described
in section 401(k)(2)(D)(ii). Accordingly, as of
January 1, 2024, the arrangement under Plan Z fails
to satisfy the requirements of section 401(k)(2)(D).
Similarly, because Plan A requires an employee
to complete a 12-month period during which the
employee is credited with at least 1,000 hours of ser-
vice in order to participate in the arrangement, as of
January 1, 2024, the arrangement under Plan A fails
to satisfy the requirements of section 401(k)(2)(D).
(B) Example 2. (1) Employer S maintains Plan
B. Employer S is comprised of Divisions T and U.
In order to be employed in Division T, an employee
is required to be classified as a full-time employee,
which Employer S defines as an employee who
completes a 12-month period during which the
employee is credited with at least 1,000 hours of
service. All other employees of Employer S are
employed in Division U. Effective January 1, 2024,
Plan B provides that, as a condition to participate
in the arrangement, an employee is required to be
employed in Division T.
(2) Because the provision of Plan B that requires
an employee to be employed in Division T in order
to participate in the arrangement has the effect of
requiring an employee to complete the period of
service described in section 401(k)(2)(D)(i), that
provision is treated as a service requirement under
paragraph (c)(3)(ii) of this section. Accordingly, as
of January 1, 2024, the arrangement under Plan B
fails to satisfy the requirements of section 401(k)(2)
(D) because the arrangement requires an employee
to complete a period of service with Employer S that
extends beyond the close of the earlier of: the period
described in section 401(k)(2)(D)(i), or the period
described in section 401(k)(2)(D)(ii).
(C) Example 3. (1) Employer V maintains Plan
C. Prior to January 1, 2024, Plan C provided that an
employee classified by Employer V as a part-time
employee was ineligible to make a cash or deferred
election under the arrangement unless the part-time
employee completed a 12-month period during
which the employee was credited with at least
1,000 hours of service with Employer V. Effective
January 1, 2024, Plan C provides that an employee
classified by Employer V as a part-time employee is
ineligible to make a cash or deferred election under
the arrangement unless the employee completes
a period of service with Employer V that extends
until the close of the earlier of: a 12-month period
during which the employee is credited with at least
1,000 hours of service, or the applicable number of
consecutive 12-month periods during each of which
the employee is credited with at least 500 hours of
service (excluding any 12-month period beginning
before January 1, 2021).
(2) Plan C does not fail to satisfy the require-
ments of section 401(k)(2)(D) merely because,
effective January 1, 2024, Plan C provides that an
employee classified as a part-time employee is inel-
igible to make a cash or deferred election under
the arrangement unless the employee completes
a period of service with Employer V that extends
until the close of the earlier of: a 12-month period
during which the employee is credited with at least
1,000 hours of service, or the applicable number of
consecutive 12-month periods during each of which
the employee is credited with at least 500 hours of
service (excluding any 12-month period beginning
before January 1, 2021).
(4) Elective contributions. A cash or
deferred arrangement satisfies the require-
ments of this paragraph (c)(4) only if
the right to make elective contributions
by a long-term, part-time employee who
is an eligible NHCE is not restricted in
a manner that would not be permitted
for an NHCE under § 1.401(k)-3(c)(6).
However, a SIMPLE 401(k) plan may
limit the amount of elective contributions
made by long-term, part-time employees
under the plan to the extent needed to
satisfy the elective contribution limita-
tion for SIMPLE 401(k) plans under sec-
tion 401(k)(11)(B)(i)(I) and (m)(10)(A).
(d) Vesting—(1) Years of vesting ser-
vice taken into account—(i) General
rule. For purposes of determining the
nonforfeitable right of a long-term,
part-time employee (or former long-term,
part-time employee) to employer contri-
butions under the plan (other than elective
contributions)—
(A) Each 12-month period (which
may be any 12-consecutive month period
that is not prohibited for use under sec-
tion 411(a)) during which the employee is
credited with at least 500 hours of service
(as defined in section 410(a)(3)(C)) with
the employer or employers maintaining
the plan is treated as a year of vesting ser-
vice; and
(B) Except for any 12-month period
beginning before January 1, 2021, all
12-month periods of service with the
employer or employers maintaining the
plan must be taken into account unless the
period of service of the employee may be
disregarded under section 411(a).
(ii) Application of vesting rules. For
purposes of this paragraph (d), section 411
will be treated as if it applies to the plan,
taking into account the modifications pro-
vided in paragraphs (d)(1)(i) and (iii) of
this section.
(iii) Break in service. For purposes
of determining whether a long-term,
part-time employee (or former long-term,
part-time employee) has incurred a 1-year
break in service, section 411(a)(6)(A) is
applied by substituting at least 500 hours
of service for more than 500 hours of
service.
(2) Former long-term, part-time
employees—(i) Definition. A former
long-term, part-time employee means an
employee who—
(A) Became eligible to participate in
the arrangement as a long-term, part-time
employee;
(B) Subsequently ceased to be a
long-term, part-time employee because
the employee was described in paragraph
(d)(2)(ii)(A) or (B) of this section; and
(C) Has not returned to long-term,
part-time employee status in accordance
with paragraph (d)(2)(iii) of this section.
(ii) Timing. A long-term, part-time
employee becomes a former long-term,
part-time employee as of the first day of
the first plan year beginning after the ear-
lier of the plan year in which the employee:
(A) Satisfies the requirements of sec-
tion 401(k)(2)(D) without regard to sec-
tion 401(k)(2)(D)(ii); or
(B) Ceases to satisfy the plan’s eligi-
bility conditions (other than age or service
conditions).
(iii) Return to long-term, part-time
employee status. If a long-term, part-time
employee who ceases to satisfy the plan’s
eligibility conditions (other than age or
service conditions) during a plan year sub-
sequently satisfies those conditions, then
the employee will return to long-term,
part-time employee status as of the first
day of the plan year during which the
employee again satisfies those condi-
tions. However, the preceding sentence
does not apply if the employee is a former
long-term, part-time employee because
the employee satisfies the requirements
of section 401(k)(2)(D) without regard to
section 401(k)(2)(D)(ii).
(3) Examples. The following examples
illustrate the vesting requirements of this
paragraph (d). For purposes of the exam-
ples, each plan includes a cash or deferred
arrangement; is maintained on a calen-
dar-year basis; provides that, for purposes
of determining whether an employee has
satisfied the requirements of paragraph
(b)(1)(i) of this section and for purposes
of determining the nonforfeitable right
of a long-term, part-time employee (or
former long-term, part-time employee)
to employer contributions under the plan
(other than elective contributions), all
12-month periods are determined by ref-
erence to the employment commence-
ment date of an employee; and provides
that, for purposes of determining the

December 18, 2023 1578 Bulletin No. 2023–51
nonforfeitable right of an employee to any
nonelective contribution made on behalf
of the employee, the plan uses a 6-year
graded vesting schedule.
(i) Example 1. (A) Employer X maintains Plan
G. Employees of Employer X are employed at
either Plant Y or Plant Z. Plan G requires that an
employee be employed at Plant Y as a condition to
participate in the arrangement. This condition is not
a proxy for age or service under paragraph (c)(3)
(ii) of this section. Employee N is an employee of
Employer X who is employed at Plant Z, and who
has an employment commencement date of June 1,
2021. During the 12-month periods beginning on
June 1, 2021, June 1, 2022, June 1, 2023, June 1,
2024, June 1, 2025, and June 1, 2026, Employee N
is credited with 600 hours of service for each period.
On June 2, 2027, Employee N is transferred to Plant
Y, becomes eligible to participate in the arrangement
in Plan G, and thereafter commences participation in
the arrangement as a long-term, part-time employee.
(B) Unless Plan G is permitted to disregard
years of vesting service for Employee N under
section 411(a), paragraph (d)(1)(i) of this sec-
tion requires Plan G to credit Employee N with 6
years of vesting service for the 12-month periods
beginning on June 1, 2021, June 1, 2022, June 1,
2023, June 1, 2024, June 1, 2025, and June 1,
2026, because Employee N is credited with at least
500 hours of service during each of those periods.
Accordingly, Employee N has a 100-percent nonfor-
feitable right to any nonelective contribution under
Plan G that is made on behalf of Employee N.
(ii) Example 2. (A) Employer A maintains Plan
H. Employee O commences participation in the
arrangement in Plan H as a long-term, part-time
employee on June 1, 2024. During the 12-month
period beginning on June 1, 2024, Employee O is
credited with 1,200 hours of service. During each of
the 12-month periods beginning on June 1, 2025, and
June 1, 2026, Employee O is credited with 600 hours
of service for the period.
(B) Based on these facts, Employee O remains
a long-term, part-time employee for the plan year
beginning January 1, 2025. Pursuant to paragraph (d)
(2)(ii) of this section, Employee O becomes a former
long-term, part-time employee beginning with the
next plan year. However, this paragraph (d) contin-
ues to apply to Employee O (although paragraphs (e)
and (f) of this section no longer apply to Employee
O beginning with the 2026 plan year). Employee O
will not cease to be a former long-term, part-time
employee merely because Employee O completes
one or more 12-month periods during each of which
the employee is credited with at least 500 (but less
than 1,000) hours of service. Thus, Employee O is
credited with a year of vesting service for each of
the 12-month periods in which Employee O is cred-
ited with at least 500 hours of service (including the
12-month periods beginning on June 1, 2025, and
June 1, 2026).
(iii) Example 3. (A) Employer B maintains Plan
J. Employees of Employer B are employed at either
Plant C or Plant D. Plan J requires, as a condition to
participate in the arrangement, that an employee be
employed at Plant C. This condition is not a proxy
for age or service under paragraph (c)(3)(ii) of this
section. Employee P is an NHCE who is employed
at Plant C, and who has an employment com-
mencement date of June 1, 2021. On June 1, 2024,
Employee P commences participation in the arrange-
ment in Plan J as a long-term, part-time employee.
During the 12-month periods beginning on June 1,
2024, and June 1, 2025, Employee P continues to be
credited with at least 500 (but less than 1,000) hours
of service for each period. However, on March 1,
2025, Employee P is transferred to Plant D and
becomes ineligible to participate in the arrangement.
On March 1, 2026, Employee P is transferred back to
Plant C and again becomes eligible to participate in
the arrangement. Employee P remains employed at
Plant C through the 2026 plan year.
(B) Based on these facts, Employee P remains
a long-term, part-time employee for the 2025 plan
year (although Employee P may not make a cash
or deferred election under the arrangement as of
March 1, 2025). Pursuant to paragraph (d)(2)(iii)
of this section, Employee P remains a long-term,
part-time employee for the 2026 plan year (although
Employee P is not eligible to make a cash or deferred
election under the arrangement again until March 1,
2026). As a result, Employee P never becomes a for-
mer long-term, part-time employee, and this para-
graph (d) continues to apply to Employee P.
(e) Nonelective and matching contribu-
tions—(1) General rule. Notwithstanding
section 401(a)(4), neither nonelective nor
matching contributions are required to be
made on behalf of long-term, part-time
employees, even if those contributions
are made on behalf of other eligible
employees.
(2) Coordination with employer elec-
tions—(i) Safe harbor contributions. A
plan that is intended to satisfy the ADP
safe harbor provisions of section 401(k)
(12) or (13) will not fail to satisfy those
provisions merely because the employer
does not make a nonelective or match-
ing contribution on behalf of an eligible
NHCE who is a long-term, part-time
employee (or makes a nonelective or
matching contribution that does not sat-
isfy the safe harbor contribution require-
ments of § 1.401(k)-3 on behalf of the
eligible NHCE), provided that long-term,
part-time employees are excluded for pur-
poses of determining whether the plan
satisfies the ADP safe harbor provisions
of section 401(k)(12) or (13) pursuant to
the election under paragraph (f)(1) of this
section. Similarly, a plan that is intended
to satisfy the ACP safe harbor provisions
of section 401(m)(11) or (12) will not
fail to satisfy those provisions merely
because the employer does not make a
nonelective or matching contribution
on behalf of an eligible NHCE who is a
long-term, part-time employee (or makes
a nonelective or matching contribution
that does not satisfy the safe harbor con-
tribution requirements of § 1.401(m)-3 on
behalf of the eligible NHCE), provided
that long-term, part-time employees are
excluded for purposes of determining
whether the plan satisfies the ACP safe
harbor provisions of section 401(m)(11)
or (12) pursuant to the election under
paragraph (f)(1) of this section.
(ii) Top-heavy minimum benefits. A
plan that is a top-heavy plan for the plan
year will not fail to satisfy the minimum
benefit requirements of section 416(c)
merely because the employer contribution
(if any) made for the plan year on behalf
of a non-key employee who is a long-term,
part-time employee does not satisfy those
requirements, provided that long-term,
part-time employees are excluded for pur-
poses of determining whether the plan sat-
isfies the minimum benefit requirements
of section 416(c) for the plan year pursu-
ant to an election under paragraph (f)(2)
of this section.
(iii) SIMPLE 401(k) contributions. An
employer may not elect under paragraph
(f) of this section to exclude long-term,
part-time employees from the application
of the SIMPLE 401(k) provisions of sec-
tion 401(k)(11) and (m)(10). Accordingly,
a plan intended to satisfy the SIMPLE
401(k) provisions of section 401(k)(11)
or (m)(10) must satisfy the matching or
nonelective contribution requirements of
§ 1.401(k)-4(e) with respect to long-term,
part-time employees.
(3) Examples. The following examples
illustrate the employer contribution rules
of this paragraph (e). For purposes of the
examples, each plan includes a cash or
deferred arrangement and is maintained
on a calendar-year basis.
(i) Example 1. (A) Employer E maintains Plan K,
which is intended to satisfy the ADP safe harbor pro-
visions of section 401(k)(12). Plan K provides that
Employer E elects to exclude all long-term, part-time
employees for purposes of determining whether Plan
K satisfies the statutory requirements listed in para-
graph (f)(1)(i) of this section, and the employer elec-
tion satisfies the requirements of paragraph (f)(1)(ii)
of this section. Plan K requires Employer E to make
a QNEC on behalf of each eligible NHCE who is
not a long-term, part-time employee equal to 3 per-
cent of the NHCE’s safe harbor compensation, and

Bulletin No. 2023–51 1579 December 18, 2023
the NHCEs who receive this contribution include
any former long-term, part-time employees who are
eligible NHCEs. Plan K provides that Employer E
is required to make a nonelective contribution on
behalf of each long-term, part-time employee equal
to 2 percent of the long-term, part-time employee’s
compensation for the plan year.
(B) Based on these facts, long-term, part-time
employees are excluded for purposes of determining
whether Plan K satisfies the statutory requirements
listed in paragraph (f)(1)(i) of this section (to the
extent the provision would otherwise apply to Plan
K), including the ADP safe harbor provisions of sec-
tion 401(k)(12). Accordingly, Plan K does not fail
to satisfy the safe harbor nonelective contribution
requirement of § 1.401(k)-3(b) merely because a
safe harbor nonelective contribution is not made on
behalf of each eligible NHCE who is a long-term,
part-time employee. In addition, because long-term,
part-time employees are also excluded for purposes
of determining whether Plan K satisfies the non-
discrimination requirements of section 401(a)(4),
any nonelective contribution made on behalf of a
long-term, part-time employee is disregarded for
purposes of determining whether nonelective contri-
butions satisfy the nondiscrimination requirements
of section 401(a)(4).
(ii) Example 2. (A) Employer F maintains
Plan L, which is intended to satisfy the SIMPLE
401(k) provisions of section 401(k)(11) and (m)
(10). Plan L provides that Employer F may elect
to exclude all long-term, part-time employees for
purposes of determining whether Plan L satisfies
the statutory requirements listed in paragraph (f)
(1)(i) of this section. Employer F elects to exclude
all long-term, part-time employees for the plan year
in accordance with the requirements of paragraph
(f)(1) of this section. Plan L requires Employer F
to make a matching contribution on behalf of each
eligible employee, excluding long-term, part-time
employees (but including any former long-term,
part-time employees who are eligible employees),
equal to 100 percent of the elective contributions
of the employee for the plan year, up to 3 percent
of the SIMPLE compensation of the employee for
the entire plan year. Plan L does not provide for
any employer contributions (other than elective
contributions) to be made on behalf of long-term,
part-time employees.
(B) Plan L fails to satisfy the SIMPLE 401(k)
provisions of section 401(k)(11) and (m)(10) for
the plan year because Plan L does not require
Employer F to make the matching contribution on
behalf of each eligible employee on whose behalf
elective contributions were made for the plan year.
(f) Employer elections—(1)
Nondiscrimination and coverage—(i)
General rule. Subject to paragraph (f)
(1)(ii) of this section, an employer may
elect to exclude long-term, part-time
employees for purposes of determining
whether the plan satisfies the following
provisions:
(A) The nondiscrimination require-
ments of section 401(a)(4);
(B) The ADP test of section 401(k)(3);
(C) The ADP safe harbor provisions of
section 401(k)(12) and (13);
(D) The ACP test of section 401(m)(2);
(E) The ACP safe harbor provisions of
section 401(m)(11) and (12); and
(F) The minimum coverage require-
ments of section 410(b).
(ii) Additional requirements. An
employer election satisfies the require-
ments of this paragraph (f)(1)(ii) if—
(A) The election applies for purposes
of every provision under paragraph (f)(1)
(i) of this section (to the extent the provi-
sion would otherwise apply to the plan);
(B) The election applies with respect
to all long-term, part-time employees
who are eligible to participate in the
arrangement;
(C) With respect to a plan that is
intended to satisfy the ADP safe harbor
provisions of section 401(k)(12) or (13),
the election is set forth in the plan and
satisfies the plan year requirements of
§ 1.401(k)-3(e); and
(D) With respect to a plan that is
intended to satisfy the ACP safe harbor
provisions of section 401(m)(11) or (12),
the election is set forth in the plan and
satisfies the plan year requirements of
§ 1.401(m)-3(f).
(2) Top-heavy—(i) General rule.
Subject to paragraph (f)(2)(ii) of this sec-
tion, an employer may elect to exclude
long-term, part-time employees for pur-
poses of determining whether the plan sat-
isfies the vesting and benefit requirements
of section 416(b) and (c). This election
does not apply for purposes of determin-
ing whether the plan is a top-heavy plan
as defined in section 416(g). However,
in the case of an employer that makes
an election described in paragraph (f)(1)
of this section (which has the effect of
excluding long-term, part-time employ-
ees for purposes of determining whether
the plan satisfies the ADP and ACP safe
harbor provisions), the plan will not fail
to be excluded from the definition of
a top-heavy plan under section 416(g)
(4)(H) merely because the employer
does not make nonelective or matching
contributions on behalf of long-term,
part-time employees (or makes nonelec-
tive or matching contributions that do not
satisfy the requirements for safe harbor
contributions).
(ii) Additional requirements. An
employer election satisfies the require-
ments of this paragraph (f)(2)(ii) if—
(A) The election applies with respect
to all long-term, part-time employees who
are eligible to participate in the arrange-
ment; and
(B) The terms of the plan provide
that long-term, part-time employees are
excluded from the application of the
vesting and benefit requirements of sec-
tion 416(b) and (c).
(3) Examples. The following examples
illustrate the employer election provisions
of this paragraph (f). For purposes of the
examples, each plan is maintained on a
calendar-year basis and includes a cash or
deferred arrangement, which is intended
to satisfy the ADP test of section 401(k)
(3).
(i) Example 1. (A) Employer G maintains Plan
M. Plan M provides that Employer G may elect
to exclude all long-term, part-time employees for
purposes of determining whether Plan M satisfies
every provision under paragraph (f)(1)(i) of this
section (to the extent the provision would otherwise
apply to Plan M). Employer G elects to exclude all
long-term, part-time employees for the plan year in
accordance with the requirements of paragraph (f)(1)
of this section. Plan M requires Employer G to make
a nonelective contribution on behalf of each eligible
employee equal to 2 percent of the compensation of
the employee for the plan year.
(B) Based on these facts, long-term, part-time
employees are excluded for purposes of deter-
mining whether Plan M satisfies every provision
under paragraph (f)(1)(i) of this section for the plan
year (to the extent the provision would otherwise
apply to Plan M), including the nondiscrimination
requirements of section 401(a)(4). Accordingly,
any nonelective contribution made on behalf of a
long-term, part-time employee for the plan year is
disregarded for purposes of determining whether
nonelective contributions made for the plan year
satisfy the nondiscrimination requirements of sec-
tion 401(a)(4).
(ii) Example 2. (A) Employer H maintains Plan
N. Plan N provides that all long-term, part-time
employees are excluded from the application of the
vesting and benefit requirements of section 416(b)
and (c). Plan N requires Employer H to make a
nonelective contribution on behalf of each eligible
employee who is credited with at least 1,000 hours
of service during the plan year equal to 3 percent
of the compensation of the employee for the plan
year. Plan N provides that each employee has a
100-percent nonforfeitable right to any nonelective
contribution Employer H makes on behalf of the
employee. Plan N is a top-heavy plan with respect
to the plan year.

December 18, 2023 1580 Bulletin No. 2023–51
(B) Based on these facts, long-term,
part-time employees are excluded from
the application of the vesting and benefit
requirements of section 416(b) and (c)
for the plan year. Accordingly, although
Plan N is a top-heavy plan with respect
to the plan year, Plan N is not required to
satisfy the top-heavy benefit provisions
of section 416(c) for the plan year with
respect to any non-key employee who is a
long-term, part-time employee.
(g) Applicability date. This sec-
tion applies to plan years that begin on or
after January 1, 2024.
Douglas W. O’Donnell,
Deputy Commissioner for Services and
Enforcement.
(Filed by the Office of the Federal Register
November 24, 2023, 8:45 a.m., and published in the
issue of the Federal Register for November 27, 2023,
88 FR 82796)

Bulletin No. 2023–51 i December 18, 2023
Definition of Terms
Revenue rulings and revenue procedures
(hereinafter referred to as “rulings”) that
have an effect on previous rulings use the
following defined terms to describe the
effect:
Amplified describes a situation where
no change is being made in a prior pub-
lished position, but the prior position is
being extended to apply to a variation of
the fact situation set forth therein. Thus, if
an earlier ruling held that a principle ap-
plied to A, and the new ruling holds that
the same principle also applies to B, the
earlier ruling is amplified. (Compare with
modified, below).
Clarified is used in those instances
where the language in a prior ruling is be-
ing made clear because the language has
caused, or may cause, some confusion. It
is not used where a position in a prior rul-
ing is being changed.
Distinguished describes a situation
where a ruling mentions a previously pub-
lished ruling and points out an essential
difference between them.
Modified is used where the substance
of a previously published position is being
changed. Thus, if a prior ruling held that a
principle applied to A but not to B, and the
new ruling holds that it applies to both A
and B, the prior ruling is modified because
it corrects a published position. (Compare
with amplified and clarified, above).
Obsoleted describes a previously pub-
lished ruling that is not considered deter-
minative with respect to future transactions.
This term is most commonly used in a ruling
that lists previously published rulings that
are obsoleted because of changes in laws or
regulations. A ruling may also be obsoleted
because the substance has been included in
regulations subsequently adopted.
Revoked describes situations where the
position in the previously published ruling
is not correct and the correct position is
being stated in a new ruling.
Superseded describes a situation where
the new ruling does nothing more than
restate the substance and situation of a
previously published ruling (or rulings).
Thus, the term is used to republish under
the 1986 Code and regulations the same
position published under the 1939 Code
and regulations. The term is also used
when it is desired to republish in a single
ruling a series of situations, names, etc.,
that were previously published over a
period of time in separate rulings. If the
new ruling does more than restate the sub-
stance of a prior ruling, a combination of
terms is used. For example, modified and
superseded describes a situation where the
substance of a previously published ruling
is being changed in part and is continued
without change in part and it is desired to
restate the valid portion of the previous-
ly published ruling in a new ruling that is
self contained. In this case, the previously
published ruling is first modified and then,
as modified, is superseded.
Supplemented is used in situations in
which a list, such as a list of the names of
countries, is published in a ruling and that
list is expanded by adding further names
in subsequent rulings. After the original
ruling has been supplemented several
times, a new ruling may be published that
includes the list in the original ruling and
the additions, and supersedes all prior rul-
ings in the series.
Suspended is used in rare situations
to show that the previous published rul-
ings will not be applied pending some
future action such as the issuance of new
or amended regulations, the outcome of
cases in litigation, or the outcome of a
Service study.
Abbreviations
The following abbreviations in current
use and formerly used will appear in
material published in the Bulletin.
A—Individual.
Acq.—Acquiescence.
B—Individual.
BE—Beneficiary.
BK—Bank.
B.T.A.—Board of Tax Appeals.
C—Individual.
C.B.—Cumulative Bulletin.
CFR—Code of Federal Regulations.
CI—City.
COOP—Cooperative.
Ct.D.—Court Decision.
CY—County.
D—Decedent.
DC—Dummy Corporation.
DE—Donee.
Del. Order—Delegation Order.
DISC—Domestic International Sales Corporation.
DR—Donor.
E—Estate.
EE—Employee.
E.O.—Executive Order.
ER—Employer.
ERISA—Employee Retirement Income Security Act.
EX—Executor.
F—Fiduciary.
FC—Foreign Country.
FICA—Federal Insurance Contributions Act.
FISC—Foreign International Sales Company.
FPH—Foreign Personal Holding Company.
F.R.—Federal Register.
FUTA—Federal Unemployment Tax Act.
FX—Foreign corporation.
G.C.M.—Chief Counsel’s Memorandum.
GE—Grantee.
GP—General Partner.
GR—Grantor.
IC—Insurance Company.
I.R.B.—Internal Revenue Bulletin.
LE—Lessee.
LP—Limited Partner.
LR—Lessor.
M—Minor.
Nonacq.—Nonacquiescence.
O—Organization.
P—Parent Corporation.
PHC—Personal Holding Company.
PO—Possession of the U.S.
PR—Partner.
PRS—Partnership.
PTE—Prohibited Transaction Exemption.
Pub. L.—Public Law.
REIT—Real Estate Investment Trust.
Rev. Proc.—Revenue Procedure.
Rev. Rul.—Revenue Ruling.
S—Subsidiary.
S.P.R.—Statement of Procedural Rules.
Stat.—Statutes at Large.
T—Target Corporation.
T.C.—Tax Court.
T.D.—Treasury Decision.
TFE—Transferee.
TFR—Transferor.
T.I.R.—Technical Information Release.
TP—Taxpayer.
TR—Trust.
TT—Trustee.
U.S.C.—United States Code.
X—Corporation.
Y—Corporation.
Z—Corporation.

December 18, 2023 ii Bulletin No. 2023–51
Numerical Finding List
1
Bulletin 2023–51
Announcements:
2023-18, 2023-30 I.R.B. 366
2023-19, 2023-30 I.R.B. 367
2023-20, 2023-30 I.R.B. 368
2023-17, 2023-31 I.R.B. 412
2023-21, 2023-31 I.R.B. 413
2023-22, 2023-32 I.R.B. 429
2023-23, 2023-34 I.R.B. 569
2023-24, 2023-35 I.R.B. 661
2023-25, 2023-37 I.R.B. 821
2023-26, 2023-37 I.R.B. 822
2023-28, 2023-37 I.R.B. 823
2023-29, 2023-41 I.R.B. 1064
2023-30, 2023-45 I.R.B. 1236
2023-31, 2023-46 I.R.B. 1251
2023-32, 2023-47 I.R.B. 1258
2023-33, 2023-47 I.R.B. 1261
2023-24, 2023-49 I.R.B. 1385
Notices:
2023-29, 2023-29 I.R.B. 1
2023-45, 2023-29 I.R.B. 317
2023-47, 2023-29 I.R.B. 318
2023-37, 2023-30 I.R.B. 359
2023-50, 2023-30 I.R.B. 361
2023-51, 2023-30 I.R.B. 362
2023-54, 2023-31 I.R.B. 382
2023-53, 2023-32 I.R.B. 424
2023-55, 2023-32 I.R.B. 427
2023-57, 2023-34 I.R.B. 560
2023-58, 2023-34 I.R.B. 563
2023-59, 2023-34 I.R.B. 564
2023-52, 2023-35 I.R.B. 650
2023-61, 2023-35 I.R.B. 651
2023-62, 2023-37 I.R.B. 817
2023-56, 2023-38 I.R.B. 824
2023-63, 2023-39 I.R.B. 919
2023-64, 2023-40 I.R.B. 974
2023-66, 2023-40 I.R.B. 992
2023-68, 2023-41 I.R.B. 1060
2023-65, 2023-42 I.R.B. 1067
2023-67, 2023-42 I.R.B. 1074
2023-69, 2023-42 I.R.B. 1079
2023-71, 2023-44 I.R.B. 1191
2023-70, 2023-45 I.R.B. 1228
2023-72, 2023-45 I.R.B. 1228
2023-73, 2023-45 I.R.B. 1232
2023-75, 2023-47 I.R.B. 1256
2023-76, 2023-49 I.R.B. 1320
2023-74, 2023-51 I.R.B. 1484
Proposed Regulations:
REG-124123-22, 2023-30 I.R.B. 369
REG-124930-21, 2023-31 I.R.B. 431
REG-120730-21, 2023-33 I.R.B. 491
REG-134420-10, 2023-34 I.R.B. 571
REG-109348-22, 2023-35 I.R.B. 662
REG-120727-21, 2023-36 I.R.B. 670
REG-122793-19, 2023-38 I.R.B. 829
REG-100908-23, 2023-39 I.R.B. 931
REG-115559-23, 2023-42 I.R.B. 1082
REG-106203-23, 2023-43 I.R.B. 1143
REG-113064-23, 2023-43 I.R.B. 1144
REG-117614-14, 2023-44 I.R.B. 1193
REG-127391-16, 2023-44 I.R.B. 1214
REG-103525-23, 2023-46 I.R.B. 1252
REG-115762-23, 2023-47 I.R.B. 1262
REG-120727-21, 2023-47 I.R.B. 1285
REG-112916-23, 2023-49 I.R.B. 1323
REG-128276-12, 2023-49 I.R.B. 1362
REG-142338-07, 2023-49 I.R.B. 1363
REG-131756-11, 2023-50 I.R.B. 1386
REG-132422-17, 2023-50 I.R.B. 1390
REG-104194-23, 2023-51 I.R.B. 1558
Revenue Procedures:
2023-31, 2023-25 I.R.B. 386
2023-26, 2023-33 I.R.B. 486
2023-27, 2023-35 I.R.B. 655
2023-17, 2023-37 I.R.B. 819
2023-30, 2023-40 I.R.B. 995
2023-31, 2023-40 I.R.B. 1057
2023-32, 2023-41 I.R.B. 1064
2023-35, 2023-42 I.R.B. 1079
2023-28, 2023-43 I.R.B. 1092
2023-33, 2023-43 I.R.B. 1135
2023-34, 2023-48 I.R.B. 1287
2023-36, 2023-51 I.R.B. 1485
2023-37, 2023-51 I.R.B. 1491
2023-38, 2023-51 I.R.B. 1544
2023-40, 2023-51 I.R.B. 1553
Revenue Rulings:
2023-13, 2023-32 I.R.B. 413
2023-14, 2023-33 I.R.B. 484
2023-15, 2023-34 I.R.B. 559
2023-15, 2023-34 I.R.B. 559
2023-16, 2023-37 I.R.B. 796
2023-17, 2023-37 I.R.B. 798
2023-18, 2023-40 I.R.B. 972
2023-19, 2023-41 I.R.B. 1059
2023-20, 2023-45 I.R.B. 1221
2023-21, 2023-49 I.R.B. 1299
2023-22, 2023-49 I.R.B. 1301
2023-23, 2023-51 I.R.B. 1472
Treasury Decisions:
9976, 2023-30 I.R.B. 354
9977, 2023-31 I.R.B. 375
9978, 2023-32 I.R.B. 415
9979, 2023-35 I.R.B. 602
9980, 2023-43 I.R.B. 1087
9981, 2023-44 I.R.B. 1174
9982, 2023-45 I.R.B. 1223
9983, 2023-46 I.R.B. 1237
1
A cumulative list of all revenue rulings, revenue procedures, Treasury decisions, etc., published in Internal Revenue Bulletins 2023–27 through 2023–52 is in Internal Revenue Bulletin
2023–52, dated December 27, 2023.

Bulletin No. 2023–51 iii December 18, 2023
Finding List of Current Actions on
Previously Published Items
1
Bulletin 2023–51
1
A cumulative list of all revenue rulings, revenue procedures, Treasury decisions, etc., published in Internal Revenue Bulletins 2023–27 through 2023–52 is in Internal Revenue Bulletin
2023–52, dated December 27, 2023.

Internal Revenue Service
Washington, DC 20224
Official Business
Penalty for Private Use, $300
INTERNAL REVENUE BULLETIN
The Introduction at the beginning of this issue describes the purpose and content of this publication. The weekly Internal Revenue
Bulletins are available at www.irs.gov/irb/.
We Welcome Comments About the Internal Revenue Bulletin
If you have comments concerning the format or production of the Internal Revenue Bulletin or suggestions for improving it,
we would be pleased to hear from you. You can email us your suggestions or comments through the IRS Internet Home Page
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