Mo. Rev. Stat. § 374.056
Except as limited by section 375.922, the director may promulgate rules establishing the specific type of delivery method for submissions of rate and form filings, rules, license applications, including materials requested in the course of a financial or market conduct examination, which are required to be submitted to the department under state law. Types of delivery methods shall be web-based interface systems such as the System for Electronic Rate Form Filing (SERFF), the National Insurance Producer Registry (NIPR), and the National Association of Insurance Commissioners' Internet-State Interface Technology Enhancement (I-SITE). Such rules may only apply to insurance companies, producers, health maintenance organizations, and any other person or entity regulated by the department under this chapter, and chapters 287, 325, 354, and 375 to 385, or a rule adopted thereunder. Any rule or portion of a rule, as that term is defined in section 536.010, that is created under the authority delegated in this section shall become effective only if it complies with and is subject to all of the provisions of chapter 536 and, if applicable, section 536.028. This section and chapter 536 are nonseverable and if any of the powers vested with the general assembly pursuant to chapter 536 to review, to delay the effective date, or to disapprove and annul a rule are subsequently held unconstitutional, then the grant of rulemaking authority and any rule proposed or adopted after August 28, 2008, shall be invalid and void.
§ 374.056, RSMo