Utah Code Ann. § 41-3-503
(5) The division shall determine, at least annually, the number of special dealer plates to be issued or renewed to each dealer prior to issuing or renewing any special dealer plates. In determining the number of special plates to be issued to a dealer, the division shall use the past motor vehicle sales history of the dealer. If no sales history is available, the division may use generally accepted motor vehicle sales projections based on:
(6)