Kernrechtsfrage
Whether the average annual income for the revised invalidity pension must be recalculated using post-1997 AHV revision elements, including childcare credits and later earnings.
Extrahierter Entscheid
No. Because the original pension entitlement arose in 1990, the revised full pension remains based on the calculation basis of the original pension.
Extrahierte Begründung
For revised increases in invalidity pensions, the calculation basis of the original pension remains applicable. The 10th AHV revision applies only to pensions whose entitlement arose after 1996; a later increase in the degree of invalidity does not create a new insured event.