Mo. Rev. Stat. § 281.005
Preemption of all ordinances and rules of political subdivisions.
281.005. Preemption of all ordinances and rules of political subdivisions. — Sections 281.210 to 281.310 and sections 281.005 to 281.115 shall preempt all ordinances, rules and regulations of political subdivisions relating to the use of subjects covered by said sections.
(L. 1992 H.B. 1764)