Questão jurídica principal
Whether the lease validly and specifically agreed ancillary costs under Art. 257a(2) OR.
Decisão extraída
The ancillary-cost clause was not sufficiently clear and specific; the tenant was not bound beyond heating and hot water costs.
Fundamentação extraída
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.