Mo. Rev. Stat. § 361.729: Persons, firms, and corporations not subject to administrative penalty for acts performed in reliance on written interpretations.

Any other provisions of the law to the contrary notwithstanding, any person, firm or corporation shall not be subject to any administrative proceeding or penalty for any acts or omissions done in reliance on a written interpretation of any sections of chapter 408, by the division of finance, which is applicable to a specific set of facts originally proposed by the person, firm or corporation prior to committing such acts or omissions.