If a motor vehicle and other vehicles are operated in combination during the time that lights are required under Section 41-6a-1603, a lamp that is obscured by another vehicle of the combination is not required to be lighted.
Utah Code § 41-6a-1605
If a motor vehicle and other vehicles are operated in combination during the time that lights are required under Section 41-6a-1603, a lamp that is obscured by another vehicle of the combination is not required to be lighted.
Utah Code § 41-6a-1605