Questione giuridica chiave
Whether the lease validly and specifically agreed ancillary costs under Art. 257a(2) OR.
Decisione estratta
The ancillary-cost clause was not sufficiently clear and specific; the tenant was not bound beyond heating and hot water costs.
Motivazione estratta
Ancillary costs must be individually and precisely designated in the lease. A mere reference to general conditions, which require several interpretive steps to identify the relevant costs, does not satisfy the statutory requirement.