Utah Code § 17C-1-504: Contesting the legality of resolution authorizing bonds -- Time limit -- Presumption.

(1) Any person may contest the legality of the resolution authorizing issuance of the bond or any provisions for the security and payment of the bond for a period of 30 days after:

(a) publication of the resolution authorizing the bond; or

(b) publication of a notice of bond containing substantially the items required under Subsection 11-14-316(2).

(2) After the 30-day period described in Subsection (1), no person may bring a lawsuit or other proceeding contesting the regularity, formality, or legality of the bond for any reason.

(3) In a lawsuit or other proceeding involving the question of whether a bond issued under this part is valid or enforceable or involving the security for a bond, if a bond recites that the agency issued the bond in connection with project area development:

(a) the bond shall be conclusively presumed to have been issued for that purpose; and

(b) the project area plan and project area shall be conclusively presumed to have been properly formed, adopted, planned, located, and implemented in accordance with this title.