Utah Code — Title 59 (Revenue and Taxation)
Utah Code § 59-13-311 — Tax is a lien against vehicle -- Removable only when tax is paid
The special fuel tax constitutes a lien upon, and has the effect of an execution duly levied against, any vehicle in which special fuel is used. The lien may not be removed until the special fuel tax is paid or the vehicle subject to the lien is sold in payment of the tax.
Source: official text