Utah Code Ann. § 53-3-202
(1) A person may not drive a motor vehicle or an autocycle on a highway in this state unless the person is:
(c)
(2) A person may not drive or, while within the passenger compartment of a motor vehicle, exercise any degree or form of physical control of a motor vehicle being towed by a motor vehicle upon a highway unless the person:
(3)
(b) A person may not drive a motor vehicle as a private passenger carrier on a highway of this state unless the person has:
(ii) a commercial driver license with:
(c) Nothing in Subsection (3)(b) is intended to exempt a person 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 person may not operate:
(d) A person is not required to have a valid class D driver license if the person is: