Kernrechtsfrage
Whether the revised Art. 31 IVG applies to the pension revision based on the insured's return to work in 2007.
Extrahierter Entscheid
No. The relevant income-earning situation was fully realized under the pre-2008 law, so the new provision could not govern the case.
Extrahierte Begründung
Intertemporal law requires applying the rules in force when the legally relevant facts materialize. The insured began work in June 2007 and, with unchanged conditions, already had the decisive earning situation before 1 January 2008.