Utah Code Ann. § 11-13-202
(1) Any two or more public agencies may enter into an agreement with one another under this chapter:
(3)
(a) In an agreement under Subsection (1), a public agency that is a party to the agreement may agree:
(4) In an interlocal agreement between a county and one or more municipalities for law enforcement service within an area that includes some or all of the unincorporated area of the county, each county and municipality that is a party to the agreement shall ensure that the agreement requires: