Utah Code Ann. § 17C-4-202
(2)
(a) Upon the adoption of a resolution or interlocal agreement under Section 17C-4-201, the agency shall provide notice as provided in Subsection (2)(b) by:
(i)
(b) Each notice under Subsection (2)(a) shall:
(3) The resolution or interlocal agreement shall become effective on the date of:
(4)
(b) After the 30-day period under Subsection (4)(a) expires, a person may not, for any cause, contest: