Kernrechtsfrage
Which pension fund is liable for invalidity benefits under Art. 23 BVG?
Extrahierter Entscheid
Neither the pension fund covering the later employment nor the earlier fund was liable; the invalidating incapacity arose after January 2000 and before August 2001, when another pension arrangement existed.
Extrahierte Begründung
The later fund was excluded because the claimant already had more than a 20% incapacity when joining it in August 2001. The earlier fund was excluded because the causal and temporal link between the 1999/2000 incapacity and later invalidity was interrupted by a prolonged return to work from February to September 2000.