No person shall use, or cause to be used, in the operation or management of a private patrol enterprise a motor vehicle or motorcycle containing lettering, markings, or insignia that:
(a) Is not distinctly different from that employed by the County or any city located in the County;
(b) Employs a star or shield; or
(c) Fails to contain the designation “Private Patrol” in letters at least four (4”) inches in height on the front doors. (§ 1, Ord. 661, eff. January 12, 1972)