Utah Code Ann. § 20A-2-101
(1) Except as provided in Subsection (2), an individual may register to vote in an election who:
(c) will be:
(ii) if the election is a regular primary election, a municipal primary election, or a Western States Presidential Primary:
(2)
(a)
(3) An individual who is eligible to vote and who resides within the geographic boundaries of the entity in which the election is held may register to vote in a: