It shall be unlawful for any person to carry or use upon any vehicle, other than emergency response vehicles of the state or any of its political subdivisions or emergency vehicles of public utilities or ambulances, any siren or emergency light similar to that used on official police or fire department vehicles of the City. (Code 1979, § 27-18; Ord. No. 95-52, exhibit A (§ 27-18), 9-11-1995)