Swiss Civil Code

¹ At the re­quest of either par­ent, the child or the child pro­tec­tion au­thor­ity, new ar­range­ments for par­ent­al re­spons­ib­il­ity shall be made by the child pro­tec­tion au­thor­ity provided this is in the child’s best in­terests due to a sub­stan­tial change in cir­cum­stances.

² The re­quire­ments for the modi­fic­a­tion of oth­er par­ent­al rights and -ob­lig­a­tions are gov­erned by the pro­vi­sions on the ef­fects of the par­ent-child re­la­tion­ship.²⁰⁴

³ If the par­ents agree, the child pro­tec­tion au­thor­ity re­as­sesses par­ent­al re­spons­ib­il­ity, res­id­ence and ap­proves a child sup­port agree­ment. In the oth­er cases, the court com­pet­ent to modi­fy the di­vorce de­cree de­cides.²⁰⁵

⁴ If the court is re­quired to de­cide on the modi­fic­a­tion of par­ent­al re­spons­ib­il­ity, res­id­ence or the child main­ten­ance con­tri­bu­tion for a minor child, it shall if ne­ces­sary also re­as­sess con­tact or shar­ing of par­ent­ing du­ties; in the oth­er cases, the child pro­tec­tion au­thor­ity shall de­cide on the modi­fic­a­tion of con­tact or shar­ing of par­ent­ing du­ties.²⁰⁶