Questão jurídica principal
Which pension fund is liable for invalidity benefits under Art. 23 BVG?
Decisão extraída
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.
Fundamentação extraída
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.