Mo. Rev. Stat. § 105.010
105.010 Terms of office.
105.010. Terms of office. — All officers elected or appointed by the authority of the laws of this state shall hold their offices until their successors are elected or appointed, commissioned and qualified.
(RSMo 1939 § 12820) Prior revisions: 1929 § 11196; 1919 § 9168; 1909 § 10197