Utah Code Ann. § 78B-1-105 – Jurors -- Competency to serve -- Persons not competent to serve as jurors -- Court to determine disqualification.

(1) A person is competent to serve as a juror if the person is:
1. (a) a citizen of the United States;
2. (b) 18 years of age or older;
3. (c) a resident of the county; and
4. (d) able to read, speak, and understand the English language.
(2) A person who has been convicted of a felony which has not been expunged is not competent to serve as a juror.
(3) The court, on its own initiative or when requested by a prospective juror, shall determine whether the prospective juror is disqualified from jury service. The court shall base its decision on:
1. (a) information provided on the juror qualification form;
2. (b) an interview with the prospective juror; or
3. (c) other competent evidence.
(4) The clerk shall enter the court's determination in the records of the court.