Mo. Const. art. VI, § 18(q)

If a majority of the votes cast by the qualified voters voting on the county constitution are in favor of the proposal, then the county constitution shall be adopted. If a majority of the votes cast by the qualified voters voting thereon are opposed to the proposal, the county constitution shall not be adopted. A proposal to create a county constitution may not be resubmitted to the voters except after the voters approve the selection of a commission to draft a county constitution as provided in section 18(m) of this article and such proposal shall not be resubmitted to the voters until two years after the proposed county constitution has been rejected. [Effective - 08 Dec 1994 , see footnote]