Utah Code § 20A-9-807
§ 20A-9-807. Combining voting precincts.
(1) The county legislative body may combine voting precincts for the presidential primary election by following the procedures and requirements of Section 20A-5-303. (2) The county legislative body may not combine voting precincts if the voting precincts are in different congressional districts as established by Section 20A-13-102.