Utah Code Ann. § 53-2a-807
(1) By July 1 of each year, each political subdivision officer shall:
(2) In the event that a political subdivision does not designate emergency interim successors as required under Subsection (1), the order of succession shall be as follows:
(3)
(a) Notwithstanding any other provision of law:
(b) An emergency interim successor shall exercise the powers and duties of the office only until: