Any person may, instead of taking an oath, opt to make a solemn affirmation or declaration, by assenting, when addressed in the following form: "You do solemnly affirm (or declare) that... ." etc., as in Section 78B-1-143.
Utah Code § 78B-1-144
Witnesses -- Affirmation or declaration instead of oath allowed
Renumbered and Amended by Chapter 3, 2008 General Session
Official source: Utah State Legislature. Reproduced from public-domain Utah statutes; confirm against the official source for the current text. Not legal advice.