Commentaries: Art. 649b

A co-owner may be excluded from the community of co-owners by court order if, as a result of his or her conduct or that of persons to whom he or she granted use of the object or for whom he or she is responsible, his or her duties towards the other co-owners individually or collectively are so seriously violated that continuation of the community of co-owners becomes unreasonable.
Where the community comprises only two co-owners, each has the right to sue the other; in other cases, unless otherwise agreed, legal action against one co-owner must be authorised by a majority of all the co-owners excluding the person to be sued.
If the court rules in favour of excluding the defendant, it shall order him or her to alienate his or her share and, should he or she fail to do so within the allowed time limit, shall order it to be sold at public auction in accordance with the provisions governing the forced sale of land to the exclusion of the provisions governing dissolution of co-ownership.

Art. 649b