Utah Code Ann. § 41-6a-1612 – Back-up lamps -- Side marker lamps.

(1)
1. (a) A motor vehicle may be equipped with one or more back-up lamps either separately or in combination with other lamps.
2. (b) A back-up lamp or lamps may not be lighted when the motor vehicle is in forward motion.
3. (c) A lighted back-up lamp shall emit a white light.
(2) A vehicle may be equipped with one or more side marker lamps that may be flashed in conjunction with turn or vehicular hazard warning signals.
(3) A back-up lamp and side marker lamp under this section shall comply with rules made by the department under Section 41-6a-1601.