The occupant of any rat-proofed or rat-stopped building is required to maintain the premises in a rat-proof or rat-stopped condition and to repair all breaks or leaks that may occur in the rat-proofing or rat-stoppage unless such breaks or leaks develop as the result of natural deterioration of the building, and failing to do so, shall be subject to the penalty provided in Section 1353.99. (Ord. 52-1964. Passed 6-15-64.)