Every owner, agent, or lessee having charge of any commercial or public pier shall furnish and keep for use on such pier, at least one serviceable 30-inch ring life buoy for every 300 lineal feet of mooring/docking space. Attached to said life buoy shall be at least 200 feet of suitable line. Each ring buoy and line attached thereto shall be kept in a suitable box on the pier for the use of the public in case of accident. The box shall be labeled and be at all times kept clear of obstructions. It shall be unlawful to take away, damage, disturb, or destroy said buoy or box except for use in saving life and property.