Mo. Rev. Stat. § 538.235 : — STATUTORY ACTIONS AND TORTSTort Actions Based on Improper Health Care — Laws applicable to what actions TEXT PDF The provisions of sections 538.205 to 538.230 shall apply only to causes of actions arising on or after February 3, 1986. § 538.235, RSMo L. 1986 S.B. 663 § 11