Question juridique clé
Whether the old pension regulations remained applicable after the transfer of affiliation and collective insurance.
Solution extraite
The old regulation did not remain fully applicable; the new institution could apply its own regulation, subject to mandatory minimum LPP limits and any acquired rights actually guaranteed.
Motifs extraits
The court distinguished cases where rentiers are covered by a collective insurance contract linked to the affiliation contract. On transfer, the earlier contract ended and the rentier moved to the new fund; absent a valid reservation or guaranteed acquired rights, the new regulation governed the calculation of benefits.