78.703.  City may abandon plan, when — procedure, election, ballot form. — Any city which has operated under the provisions of sections 78.700 to 78.720 not less than six years may abandon the form of organization provided for herein, by proceeding as follows:  Upon the petition of not less than twenty-five percent of the voters casting votes for governor in the last preceding general election of such city, as shown by the total vote cast at the last preceding municipal election of the city, the question shall be submitted whether the city shall continue operating under the provisions of sections 78.700 to 78.720.  The question shall be submitted in substantially the following form:

Shall the city manager form of government for the city of ______ be continued?