Article 1663

The lessee is obliged to bring to the knowledge of the proprietor, within the shortest possible time, every usurpation or untoward act which any third person may have committed or may be openly preparing to carry out upon the thing leased.

He is also obliged to advise the owner, with the same urgency, of the need of all repairs included in No. 2 of article 1654.

In both cases the lessee shall be liable for the damages which, through his negligence, may be suffered by the proprietor.

If the lessor fails to make urgent repairs, the lessee, in order to avoid an imminent danger, may order the repairs at the lessor's cost. (1559a)