Mo. Rev. Stat. § 162.341
162.341 Annual election, when held.
162.341. Annual election, when held. — The annual election in seven-director districts, except urban districts, shall be held on municipal election days.
(L. 1963 p. 200 § 3-34, A.L. 1978 H.B. 971) (Source: RSMo 1959 § 165.330)