Mo. Rev. Stat. § 78.720
Except as otherwise provided in sections 78.700 to 78.720, the provisions of sections 78.430 to 78.640 shall apply to the adoption, implementation, or abandonment of the optional city manager form of government, provided that:
(3) Separate ballots shall be provided in all elections held pursuant to the adoption of the optional city manager form of government for the offices of councilmen at large and ward councilman, designated as follows:
"FOR COUNCILMEN AT LARGE" or "FOR ______ WARD COUNCILMAN".
(L. 1985 H.B. 244 § 5 subdivs. (1), (2), (3))