1. If the lessee, with the lessor's permission, carries out constructions or repairs for the benefit or maintenance of the leased property, they shall have recourse against the lessor for what they spent within the customary limits, even if no recourse was stipulated. 2. If what the lessee has carried out is for their personal benefit, they shall have no recourse against the lessor, unless otherwise agreed.
Interpretation and application must be checked against the official text and current version.