All vessels, craft, or floats which are engaged in lake commerce between the port of Indiana Harbor and other lake ports and all passenger and excursion boats and steamers entering or leaving the port or harbor of the city shall be provided and equipped with adequate tanks to receive and hold all garbage, refuse, filth, dung, carrion, offal, putrid, or unwholesome substance or the contents of the privies or water closets while in port, and the contents of the tanks shall not be dumped within ten miles of the shore line of the city or into the waters of Lake Michigan nearer than ten miles from any intake of water for public consumption.
(Prior Code, § 101.15) Penalty, see § 96.999