Mo. Rev. Stat. § 324.272: Preemption clause.

1. Except as provided in subsection 2 of this section, sections 324.240 to 324.275 shall preempt any rule, regulation or order adopted by a political subdivision of the state relating to the licensing or regulation of massage therapists or massage businesses.

2. Sections 324.240 to 324.275 shall not affect:

(1) Local regulations relating to zoning requirements, local health department regulations, or occupational license taxes pertaining to massage therapists or massage businesses; or

(2) Local regulations that do not relate to the practice of massage therapy as performed by a Missouri state licensed massage therapist, including regulations of those professions who perform duties with a licensed massage therapist.