Art. 53 PILA from 2022

Art. 53 b. Specific conditions
1 A choice of law must be agreed in writing or result with certainty from the provisions of a marital agreement; in all other respects, it is governed by the chosen law.
2 A choice of law may be made or amended at any time. A choice of law made after the celebration of marriage has retroactive effect as of the celebration date, unless the parties agree otherwise.
3 The chosen law remains applicable as long as the spouses have not amended or revoked their choice.
Es besteht kein Anspruch auf Aktualität und Vollständigkeit/Richtigkeit.