Such petition shall describe the proposed boundaries of the district, recite the reasons for the proposed formation, pray that the same be organized under this act, and propose a name by which such district shall be known. The persons seeking to organize a district shall include in the petition a statement limiting the annual property tax rate, not to exceed twenty cents ($0.20) for each one hundred dollars ($100) of assessed valuation, which may be levied by the board for the purpose of purchasing water for replenishment purposes, and the board shall thereafter be limited to the rate so fixed in the petition for formation, unless a majority of the electors voting at an election held for that purpose later change the rate so fixed in the petition.