Questão jurídica principal
What rent base is used for indexation under an indexed lease when the tenant invokes defects?
Decisão extraída
The indexed rent is calculated from the contractual rent amount, not from a reduced amount the tenant considers due because of alleged defects.
Fundamentação extraída
Under Art. 270c CO, in an indexed lease the parties may only contest whether the requested change corresponds to the index variation. A defect-based reduction must first be determined on the contractual rent as indexed; the tenant's approach would conflict with the structure of the statute and would improperly let a reduced rent persist after defects are cured until the next indexing date.