2011 Utah Code
Title 10 Utah Municipal Code
Chapter 2 Incorporation, Classification, Boundaries, Consolidation, and Dissolution of Municipalities
Section 302 Change of class of municipality.

10-2-302. Change of class of municipality.
(1) Each municipality shall retain its classification under Section 10-2-301 until changed as provided in this section or Subsection 67-1a-2(3).
(2) If a municipality's population, as determined by the lieutenant governor under Subsection 67-1a-2(3), indicates that the municipality's population has decreased below the limit for its current class, the legislative body of the municipality may petition the lieutenant governor to prepare a certificate indicating the class in which the municipality belongs based on the decreased population figure.
(3) A municipality's change in class is effective on the date of the lieutenant governor's certificate under Subsection 67-1a-2(3).