Questão jurídica principal
Whether the new collective labor agreement constituted a revision ground under Art. 17 ATSG in a new application for disability benefits.
Decisão extraída
A change in a collective labor agreement does not, as a rule, justify revising the previously determined valid income because it is an external general economic development, not a personal change in the insured's circumstances.
Fundamentação extraída
The valid income is generally not to be altered after initial determination, absent narrow exceptions. The new GAV resulted from social-partner negotiations applicable to many employees, not from a probable personal arrangement of the insured. Practicality also speaks against treating widespread GAV changes as revision grounds.