Question juridique clé
Whether the material provisions of the ATSG applied to the repayment dispute
Solution extraite
The material provisions of the ATSG did not apply because the relevant facts and payments predated 1 January 2003.
Motifs extraits
All pension payments occurred before the ATSG entered into force, and the decisive legal situation had already arisen before that date; in any event, the result would be the same under ATSG rules.