S.D. Codified Laws § 46A-6-4
If such contract provides for payments to be made extending over a period of more than one year from the date of making such contract, the board of directors shall submit such contract to the legal voters of such district at any general election, or at a special election called therefor, for the approval or disapproval of such contract. If a special election is called for such purpose the notice of election, conduct of such election, and canvass of the votes shall so far as practicable be the same as elections held for the purpose of voting upon the issuance of bonds. The ballots at such elections shall have printed thereon "For approval of contract for water supply" and "Against approval of contract for water supply." Notice of such election need not give the entire contract, but shall be sufficient if it shall state in a general way the substance thereof. If a majority of the voters voting on such proposition, vote for approval of such contract, the board of directors shall enter into such contract and shall thereafter, at the time the other taxes of the district are levied, levy a tax on the taxable property of the district sufficient to pay the amount due and to become due on such contract before the next annual levy in such district.
SDCL 46A-6-4