The port director is hereby granted the power and authority to, from time to time, but without any obligation or duty to do so, and without any obligation or liability on the port director’s part or that of the city for their failure to do so, replace defective mooring lines, pump boats which are in dangerous condition for lack thereof, and to move any boat for the purpose of protecting the boat from fire or other hazard, or for the protection of other boats therefrom. Whenever the port director shall perform any of the acts hereinbefore authorized, after having given notice to the boat owner or operator at the registered address of the immediate need therefor, or having attempted to give such notice, the boat and owner thereof are hereby required to pay to the city such fees as are set forth by the port commission. [Ord. 17-11 § 2.]