Mo. Rev. Stat. ยง 28.005
28.005 Secretary of state, term of office, term begins, when.
28.005. Secretary of state, term of office, term begins, when. โ The secretary of state shall hold office for a term of four years beginning at 12:00 noon on the second Monday in January next after his or her election and until a successor is elected and qualified.
(L. 1987 H.B. 456)