S.D. Codified Laws § 46A-6-3

If the contract provided in § 46A-6-2 provides for payment of the entire purchase price of the water supply within one year after the making of the contract, the board of directors of the district shall, at the time of entering into the contract, pass a resolution that a levy shall be made sufficient to raise a sum necessary to pay the purchase price. The board of directors shall thereafter, and at the same time the levy for other taxes of the district is made, levy a tax against the taxable property of the district sufficient to raise and pay the sum.