The board shall, on or before the first day of September of each year, certify to the board of commissioners the rate so fixed with corrections that at the time and in the manner required by law for levying taxes for county purposes such board of county commissioners shall levy such taxes upon the assessed valuation of all taxable property within the district, in addition to such other taxes as may be levied by such board of county commissioners at the rate so fixed and determined. It shall be the duty of the body having authority to levy taxes within each county to levy the taxes provided in this act, and it shall be the duty of all officials charged with the duty of collecting taxes to collect such taxes at the time and in the manner and form and with like interest and penalties as other taxes are collected, and when collected, to pay the same to the district ordering its levy and collection, and the payment of such collection shall be made monthly to the treasurer of the district and paid into the depository thereof, to the credit of the district.