Mo. Rev. Stat. § 67.420
67.420 Ordinance may provide penalties for noncompliance or delay.
67.420. Ordinance may provide penalties for noncompliance or delay. — Any ordinance adopted may provide that the failure to comply with the notice of declaration of nuisance within a reasonable time or failure to proceed continuously without unnecessary delay will be punishable as set forth in the ordinance.
(L. 1969 H.B. 60 § 3)