Utah Code Ann. § 20A-2-202
(1)
(c) In order to register to vote in a particular election, the citizen shall:
(2) Upon receipt of a correctly completed by-mail voter registration form, the county clerk shall:
(3)
(a) If the county clerk receives a correctly completed by-mail voter registration form that is postmarked after the voter registration deadline, the county clerk shall:
(b) When the county clerk receives a correctly completed by-mail voter registration form at least seven days before an election that is postmarked on or before the date of the voter registration deadline, the county clerk shall: