Questão jurídica principal
Whether the tenants could challenge the initial rent under Art. 270 CO
Decisão extraída
Yes. In a compulsory official-form canton with market shortage, it was not unreasonable for the tenants to accept the lease and then contest the initial rent.
Fundamentação extraída
The shortage of housing was a notorioius fact in Geneva; the statutory prerequisites of Art. 270 CO are alternative and the tenants proved sufficient grounds for challenge.