Referendum to increase millage.

The millage authorized to be levied in s. 200.071 for county purposes, including dependent districts therein, may be increased for periods not exceeding 2 years, provided such levy has been approved by majority vote of the qualified electors in the county or district voting in a general election, as defined in s. 97.021, called for such purpose. Such an election may be called by the governing body of any such county or district on its own motion and shall be called upon submission of a petition specifying the amount of millage sought to be levied and the purpose for which the proceeds will be expended and containing the signatures of at least 10 percent of the persons qualified to vote in such election, signed within 60 days prior to the date the petition is filed.