Utah Code Ann. § 31A-37-402
(1) A sponsor of a sponsored captive insurance company shall be:
(d) an insurance holding company that:
(2)
(a) The business written by a sponsored captive insurance company with respect to a protected cell shall be fronted by an insurer that is:
(i) authorized or approved:
(iii) subject to Subsection (2)(b), secured by a trust fund:
(b)
(i) The amount of security provided by the trust fund described in Subsection (2)(a)(iii) may not be less than the reserves associated with the liabilities of the trust fund, including:
(iii) If the form of security in the trust described in Subsection (2)(a)(iii) is a letter of credit, the letter of credit shall be established, issued, or confirmed by a bank that is: