5-2-1. Service of process.

(1) Whenever service is required to be given under this title for enforcement purposes, the document shall be served by:

(a) regular mail, postage prepaid, to the last known address of the owner or other responsible person;

(b) posting the notice conspicuously on or in front of the property. If not inhabited, the notice must also be mailed as in Subsection (1)(a). The form of the posted notice shall be approved by the ordinance enforcement administrator or designee;

(c) personal service pursuant to Utah Rules of Civil Procedure Rule 4(e)(1) or Rule 4(e)(5); or

(d) publishing in a newspaper of general circulation where the identity or whereabouts of the person to be served are unknown and cannot be ascertained through reasonable diligence, where service is impracticable under the circumstances, or where there exists good cause to believe that the person to be served is avoiding service of process.

(2) Service by regular mail shall be deemed served on the third day after the date of mailing.

(3) If service complies with the requirements of this section, it shall be deemed a valid service even if a party claims not to have received the service and it shall not affect the validity of any proceedings taken under this title.