Mo. Rev. Stat. § 572.100
Preemption — exclusions.
572.100. Preemption — exclusions. — The general assembly by enacting this chapter intends to preempt any other regulation of the area covered by this chapter. No governmental subdivision or agency may enact or enforce a law that regulates or makes any conduct in the area covered by this chapter an offense, or the subject of a criminal or civil penalty or sanction of any kind. The term "gambling" , as used in this chapter, does not include licensed activities under sections 313.800 to 313.840 .
(L. 1977 S.B. 60, A.L. 1991 H.B. 149 Adopted by Referendum, Proposition A, November 3, 1992)