Mo. Rev. Stat. § 115.904
Applicability.
115.904. Applicability. — The voting procedures in sections 115.900 to 115.936 shall apply to:
(1) A general, special, or primary election for federal office;
(2) A general, special, or primary election for statewide or state legislative office or state ballot measure; or
(3) Any election in which absentee voting is conducted pursuant to sections 115.275 to 115.304 .
(L. 2013 S.B. 116, A.L. 2022 H.B. 1878)