All openings made in streets, alleys, sidewalks, or any other public place shall be protected at all hours by sufficient barriers on which signal lights or flares shall be placed and maintained after dark. It shall be the duty of the master plumber to notify Police and Fire Departments when the streets, alleys, sidewalks, or any other public place are fully obstructed.
(Prior Code, § 97.082) Penalty, see § 10.999