Mo. Rev. Stat. § 66.703

In any county where the question submitted pursuant to section 66.700 is approved, the circuit judges of the circuit where such county is located shall, within sixty days after certification of the election results by the election authority, appoint a commission to frame the county constitution, consisting of fourteen residents of the county, who shall serve without pay, and be equally divided between the two political parties casting the greater number of votes for governor at the last preceding gubernatorial election.