Questione giuridica chiave
Whether the pension fund had to increase the retirement benefit by CHF 13,240 plus interest because transitional protection was allegedly breached.
Decisione estratta
No. The fund correctly calculated the benefit under the 2003 regulations and owed no additional amount beyond the adjusted pension.
Motivazione estratta
The protected vested right covered only the already acquired vested-benefit amount, not the future accrual parameters or the previously recognized insurance duration. The fund therefore did not have to carry forward the 1.5833 credited years into the new calculation.