Utah Code Ann. § 11-36a-602
(1) A local political subdivision may expend impact fees only for a system improvement:
(2)
(a) Except as provided in Subsection (2)(b), a local political subdivision shall expend or encumber an impact fee collected with respect to a lot:
(b) A local political subdivision may hold the fees for longer than six years if it identifies, in writing:
Amended by Chapter 190, 2017 General Session