Mo. Rev. Stat. § 535.120
Current with changes from the 2023 Legislative Session
Whenever one month's rent or more is in arrear from a tenant, the landlord, if he has a subsisting right by law to reenter for the nonpayment of such rent, may bring an action to recover the possession of the demised premises.
§ 535.120, RSMo
RSMo 1939 § 2979, A.L. 2009 H.B. 481