Question juridique clé
Whether one co-tenant spouse may alone validly challenge a rent increase before conciliation
Solution extraite
No. Co-tenants are necessary co-parties for contesting a rent increase and must act together already at the conciliation stage.
Motifs extraits
The lease was a joint lease with identical rent for both solidary debtors; acceptance of a rent increase occurs if not timely challenged. One tenant cannot challenge while the other remains passive. The analogy to Art. 273a CO does not apply to rent disputes.