Mo. Rev. Stat. § 376.755
No person, including a member insurer, agent or affiliate of an insurer shall make, publish, disseminate, circulate, or place before the public, or cause directly or indirectly, to be made, published, disseminated, circulated or placed before the public, in any newspaper, magazine or other publication, or in the form of a notice, circular, pamphlet, letter or poster, or over any radio station or television station, or in any other way, any advertisement, announcement or statement, written or oral, which uses the existence of the insurance guaranty association of this state for the purpose of sales, solicitation, or inducement to purchase any form of insurance or other coverage covered by sections 376.715 to 376.758. If a policy exceeds the limitations of coverage under sections 376.715 to 376.758, the insurer shall prominently inscribe on an endorsement to the insurance contract the limitations of coverage provided by the guaranty association. This section shall not apply to the Missouri Life and Health Insurance Guaranty Association or any other entity which does not sell or solicit insurance or coverage by a health maintenance organization.
§ 376.755, RSMo