It shall be unlawful for any person, firm, or corporation to use any motor vehicle for taxicab services unless that vehicle is designated as a taxicab by two or more colored signs, which signs must be permanently painted of a fast color on the body of the vehicle. The signs must designate the person, persons, firm, or corporation to which the vehicle belongs, and must be readable at 150 feet or more with the naked eye of a person of normal vision.
Penalty, see § 10.99