Utah Code § 11-36a-602: Expenditure of impact fees.

(1) A local political subdivision may expend impact fees only for a system improvement:

(a) identified in the impact fee facilities plan; and

(b) for the specific public facility type for which the fee was collected.

(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:

(i) for a permissible use; and

(ii) within six years after the impact fee with respect to that lot is collected.

(b) A local political subdivision may hold the fees for longer than six years if it identifies, in writing:

(i) an extraordinary and compelling reason why the fees should be held longer than six years; and

(ii) an absolute date by which the fees will be expended.