Art. 119 PILA from 2022

Art. 119 b. Immovable property
1 Contracts relating to immovable property or to the use of immovable property are governed by the law of the state where the property is located.
2 A choice of law is allowed.
3 However, the form of the contract is governed by the law of the state in which the immovable property is located, unless such state allows the application of another law. For immovable property located in Switzerland, the form of the contract is governed by Swiss law.
Es besteht kein Anspruch auf Aktualität und Vollständigkeit/Richtigkeit.