Utah Code § 10-2-905
§ 10-2-905. Municipal boundary adjustment effect on local districts and special service districts.
Except as provided in Section 17B-1-416 and Subsection 17B-1-502(2), the adjustment of a boundary shared by municipalities does not affect the boundaries of: (1) a local district under Title 17B, Limited Purpose Local Government Entities -- Special Districts; or (2) a special service district under Title 17D, Chapter 1, Special Service District Act.