S.D. Codified Laws § 7-21-37
For the purpose of providing funds for the payment of outstanding warrants and claims and liabilities, the board of county commissioners may, whenever the total amount of delinquent taxes for the preceding year on real estate payable into any fund shall be more than five percent of the total amount of taxes levied on real estate during the preceding year, without being required to submit the question of so doing to any election, by a resolution provide for the borrowing of money for the fund in an amount equal to the excess of delinquent taxes over five percent and shall issue certificates of indebtedness therefor, which shall be in denomination of one hundred dollars or multiples thereof, shall bear interest at a rate to be negotiated by the parties from the date thereof until paid and redeemed and shall be registered in the office of the county treasurer.
SDCL 7-21-37