Art. 69 PILA from 2022

Art. 69 2. Relevant time
1 For the determination of the law applicable to the formation, declaration or contesting of a parent-child relationship, the date of birth is decisive.
2 However, in case of a judicial declaration or contesting of a parent-child relationship, the date of the action is decisive if a preponderant interest of the child so requires.
Es besteht kein Anspruch auf Aktualität und Vollständigkeit/Richtigkeit.