Mo. Rev. Stat. § 190.070: Annexation, petition for — hearing — election, form of ballot.

1. A petition for annexation of land to an ambulance district shall be signed by not less than ten percent or fifty voters, whichever is fewer, residing within the territory therein described proposed for annexation and shall be filed with the county clerk of the county in which the district or the greater portion thereof is situated, and shall be addressed to the commissioners of the county commission. A hearing shall be held thereon within thirty days of the filing of such petition. If upon the hearing the commissioners of the county commission find that the petition is in compliance with the provisions of sections 190.005 to 190.085, they shall order the question to be submitted to the voters within the territory and within the district.

2. The question shall be submitted in substantially the following form to all of the voters in the existing ambulance district and the area proposed to be annexed:

Shall _________ (description of territory) be annexed to the _________ ambulance district, and a tax imposed within such annexed area equal to the existing rate of the _________ ambulance district?

3. If a majority of the votes cast on the question are in favor of the annexation, the commissioners of the county commission shall, within thirty days of the certification of the election results, by order declare the territory annexed and shall describe the altered boundaries of the district. A copy of the same shall be filed with the county clerk.