Commentaries: Art. 289a

The lessee requires the lessor’s written consent in order to:
1. alter the manner in which the object has traditionally been managed in ways which will have lasting significance beyond the duration of the lease;
2. carry out renovations or modifications to the object above and beyond the remit of normal maintenance.
Once such consent has been given, the lessor may require the restoration of the object to its previous condition only if this has been agreed in writing.
Where the lessor has not given his written consent to an alteration within the meaning of paragraph 1 let. a. and the lessee has failed to reverse such alteration within an appropriate time, the lessor may terminate the contract with immediate effect or, for leases of residential and commercial premises, subject to at least 30 days’ notice expiring on the last day of a calendar month.