Mo. Rev. Stat. § 72.167
1. When the petition for a proposed consolidation of municipalities originates from a group of citizens within a municipality to be included in the proposal, the petition shall be filed with the governing body of the municipality affected. The governing body of the municipality shall then have ninety days, from the filing of the petition, to study and investigate the proposal and endorse thereon their approval or disapproval. In either alternative, the governing body shall forward the petition with a certification of the municipality's clerk, stating the action taken by the governing body, to the county commission. The certification may, but shall not be required to, contain reasons for approval or disapproval of the petition, but whether approved or disapproved, the certification shall also contain the following information:
(L. 1961 p. 193 § 72.158)