Utah Code Title 41. Motor Vehicles § 41-6a-1604. Motor vehicle head lamps, tail lamps, stop lamps, and other lamps--Requirements--Penalty

(2)(a) A motor vehicle, trailer, semitrailer, pole trailer, and any other vehicle which is being drawn at the end of a combination of vehicles, shall be equipped with at least two tail lamps and two or more red reflectors mounted on the rear.

(c) Either a tail lamp or a separate lamp shall be so constructed and placed as to illuminate with a white light the rear registration plate.

(3)(a) A motor vehicle, trailer, semitrailer, and pole trailer shall be equipped with two or more stop lamps and flashing turn signals.

(b) A supplemental stop lamp may be mounted on the rear of a vehicle, if the supplemental stop lamp:

(4)(a) Each head lamp, tail lamp, supplemental stop lamp, flashing turn lamp, other lamp, or reflector required under this part shall comply with the requirements and limitations established under Section 41-6a-1601.

(b) The department, by rules made under Section 41-6a-1601, may require trucks, buses, motor homes, motor vehicles with truck-campers, trailers, semitrailers, and pole trailers to have additional lamps and reflectors.

(a) one tail lamp on any vehicle equipped with only one when it was made;

(b) one stop lamp on any vehicle equipped with only one when it was made;  and

(c) passenger cars and trucks with a width less than 80 inches and manufactured or assembled prior to January 1, 1953, need not be equipped with electric turn signal lamps.

(6)(a) As used in this section, “continuously flashing light system” means a light system for a supplemental stop lamp described in Subsection (3)(b) in which the stop lamp or reflector pulses rapidly for no more than five seconds when the brake is applied and then converts to a continuous light as a normal stop lamp or reflector until the time that the brake is released.

(b) A motor vehicle, trailer, semitrailer, and pole trailer may be equipped with a continuously flashing light system.