Mo. Rev. Stat. § 354.015
All health services corporations heretofore or hereafter organized shall be subject to the provisions of sections 354.010 to 354.380, to the provisions of the other laws of this state which are specifically designated in sections 354.010 to 354.380, and to the provisions of any other laws of this state relating to insurance which specifically state they shall apply to health services corporations. The provisions of this act* shall not apply to any labor organization's health plan providing services established and maintained solely for its members and their dependents, and facilities of not-for-profit corporations in existence on October 1, 1980, subject either to the provisions and regulations of section 302 of the Labor-Management Relations Act, 29 U.S.C. 186 or the Labor-Management Reporting and Disclosure Act, 29 U.S.C. 401-538.
§ 354.015, RSMo