Mo. Rev. Stat. § 94.510
1. Any city may, by a majority vote of its council or governing body, impose a city sales tax for the benefit of such city in accordance with the provisions of sections 94.500 to 94.550; provided, however, that no ordinance enacted pursuant to the authority granted by the provisions of sections 94.500 to 94.550 shall be effective unless the legislative body of the city submits to the voters of the city, at a public election, a proposal to authorize the legislative body of the city to impose a tax under the provisions of sections 94.500 to 94.550.
The ballot of submission shall be in substantially the following form:
Shall the city of ..................... (insert name of city) impose a city sales tax of ........................ (insert rate of percent) percent?
[] YES [] NO
If a majority of the votes cast on the proposal by the qualified voters voting thereon are in favor of the proposal, then the ordinance and any amendments thereto shall be in effect. If a majority of the votes cast by the qualified voters voting are opposed to the proposal, then the legislative body of the city shall have no power to impose the tax herein authorized unless and until the legislative body of the city shall again have submitted another proposal to authorize the legislative body of the city to impose the tax under the provisions of sections 94.500 to 94.550, and such proposal is approved by a majority of the qualified voters voting thereon.
(L. 1969 p. 166 § 2, A.L. 1977 S.B. 344, A.L. 1978 S.B. 490, A.L. 1985 H.B. 842, A.L. 1991 H.B. 29)