Utah Code Ann. § 17B-1-416
(1) An area outside the boundaries of a special district that is annexed to a municipality under Title 10, Chapter 2, Part 8, Annexation, or added to a municipality by a boundary adjustment under Title 10, Chapter 2, Part 9, Municipal Boundary Adjustments, is automatically annexed to the special district if:
(a) the special district provides:
Amended by Chapter 11, 2025 Special Session 1