Kernrechtsfrage
Whether the right to tax the alleged waiver of the matrimonial participation claim was time-barred because the waiver occurred in 1999.
Extrahierter Entscheid
The authorities did not establish that the claim was waived in 1999; the taxpayers did not prove that earlier date, so prescription based on 1999 failed.
Extrahierte Begründung
The mere declaration of assets under usufruct rules did not show waiver of the matrimonial claim. However, the court found the cantonal reasoning arbitrary to the extent it relied only on those fiscal declarations; the burden of proving an earlier waiver lay on the taxpayers who invoked prescription.