Utah Code § 7-5-12
A committee of the board of directors, exclusive of any active officers of the trust department, of every trust company authorized to engage in the trust business in this state shall, at least once during a 15-month period, make a suitable audit of the trust business operations of the institution or cause a suitable audit to be made by auditors responsible only to the board of directors and shall ascertain whether the trust business operations of the institution have been administered in accordance with law and sound fiduciary principles. A report of the audit, together with the action taken thereon, shall be made available to the commissioner, his examiners, or the examiners of other trust company regulating agencies upon request. An examination by the state or other trust company regulating agencies or both made during the same period may be substituted for this audit.
Utah Code § 7-5-12