No moving or stationary advertising sign shall be displayed on a vessel plying waterways adjacent to Commercial Districts and within view from an arterial highway. For the purposes of this Section, arterial highways shall include all highways that are shown on the Master Plan of Arterial Highways and Major Streets as "principal routes," "parkways" or "toll crossings" and that have been designated by the City Planning Commission as arterial highways to which the provisions of this Section shall apply.

For the purposes of this Section, advertising sign is a sign that directs attention to a profession, business, commodity, service or entertainment conducted, sold or offered elsewhere than upon the premises of the vessel and is not accessory to a use on such vessel.