Utah Code Ann. § 53-3-202
(1) A human driver may not drive a motor vehicle or an autocycle on a highway in this state unless the human driver is:
(c)
(2) A human driver may not drive a motor vehicle or perform lateral or longitudinal vehicle motion control for a vehicle being towed by another motor vehicle upon a highway unless the human driver:
(3)
(b) A human driver may not drive a motor vehicle as a private passenger carrier on a highway of this state unless the human driver has:
(ii) a commercial driver license with:
(c) Nothing in Subsection (3)(b) is intended to exempt a human driver driving a motor vehicle as a private passenger carrier from regulation under other statutory and regulatory schemes, including:
(4)
(a) Except as provided in Subsections (4)(b), (c), (d), and (e), a human driver may not operate:
(d) An individual is not required to have a valid class D driver license if the person is: