Mo. Code Regs. Ann. tit. 20, § 200-6.500
PURPOSE: This rule specifies the standards for determining whether there is an available market in Missouri for the class of coverage required by a prospective insured, both as to the type of coverage and the quality of coverage, such that an insurer admitted to business in Missouri must be used, or whether, in the alternative, a surplus lines licensee may be used to obtain coverage from a nonadmitted insurer.
(1) For purposes of section 384.017, RSMo, an available market shall be deemed not to exist for the type and quality of coverage required by the insured if, at the time of the request, the surplus lines licensee and the licensee’s producing insurance producer, if any, have been unable, after the exercise of due diligence, to obtain such coverage from both—