Utah Code § 41-1a-1219: Motor carrier fee.

(1) At the time application is made for registration or renewal of registration of a motor vehicle or combination of motor vehicles over 14,000 pounds gross combined weight rating, the applicant shall pay a motor carrier fee of $6 for each motor vehicle or combination of motor vehicles.

(2) This fee is in addition to the registration fees under Subsections 41-1a-1206(1)(d) and (e).

(3) For a vehicle registered for a 24-month period as provided in Section 41-1a-215.5, the fee amounts under this section are double the amounts due for the same vehicle registered for a 12-month period.