(a) The Traffic Control Map and File, existing as of the date of passage of this Traffic Code, is incorporated as a part of this Traffic Code. The Map and File shall be prepared and maintained to date by the Police Division under supervision of the City Manager.
(b) Council may amend the Traffic Control Map and File by ordinance, but no such ordinance shall be enforceable until after the effective date of the ordinance and the official signs, signals or markings are erected or placed in proper position. The Police Division upon receipt of a copy of the amending ordinance shall record the information on the File and amend the Map to conform with the ordinance provisions.