It shall be unlawful for any person to use any motor vehicle for taxicab service unless that vehicle is designated as a taxicab by two or more colored signs, the signs to be permanently painted of a fast color on the body of the vehicle. The signs shall designate the person to which the vehicle belongs, and shall be readable from a distance of 150 feet or more by the naked eye of a person of normal vision.
(`81 Code, § 119.02) Penalty, see § 10.99