All public and private docks and wharves in the City of Berkeley, wherever located, shall be so protected as to prevent rats from gaining entrance to such docks or wharves at either high or low tide from vessels anchored or moored alongside of such docks or wharves, or from other sources, and all food products stored in docks or wharves shall be so kept and stored as to prevent rats from gaining access thereto or coming in contact therewith. (Ord. 4883-NS § 1 Exhibit A, Ch. 5 Art. 3 § 9, 1976)