Question juridique clé
Which prior decision is the temporal benchmark for the pension revision?
Solution extraite
The benchmark is the 5 July 2004 decision, because it was the last merits-based decision changing the entitlement.
Motifs extraits
For a revision under Art. 17(1) ATSG, the comparison basis is the last legally binding decision based on a proper merits review and correct fact-finding. That was the 2004 increase to a full pension, not the earlier 1999 decision.