Mo. Rev. Stat. § 337.705: Discrimination prohibited, when.

No official, employee, board, commission, or agency of the state of Missouri, any county, municipality, school district, or other political subdivision of this state shall discriminate between persons licensed under sections 337.700 to 337.739 when promulgating rules or when requiring or recommending services that legally may be performed by persons licensed under sections 337.700 to 337.739.