Art. 47 PILA from 2022

Art. 47 2. Jurisdiction at the place of origin
If neither spouse has domicile or habitual residence in Switzerland, and if at least one of them is a Swiss citizen, the judicial or administrative authorities at the place of origin have jurisdiction to hear actions or to order measures relating to the effects of marriage, provided such action or request cannot be filed or cannot reasonably be expected to be filed at the domicile or habitual residence of either spouse.
Es besteht kein Anspruch auf Aktualität und Vollständigkeit/Richtigkeit.