S.D. Codified Laws § 9-21A-12
The amount of taxes levied each year by each municipality shall be certified to the county auditor in the manner now or hereafter provided by law. Taxes levied for payment of bonds shall continue to be spread upon all taxable property within the boundaries of the municipality in proportion to the assessed valuation thereof. The remaining amount of the taxes levied each year shall be allocated by the county auditor to the urban service district and the rural service district in amounts proportionate to the current benefit ratio times the current benefit between the full and true values of all taxable property within the urban service district and all taxable property within the rural service district. Within each district, the amount so allocated shall be spread upon all taxable property in proportion to the assessed valuation thereof.
SDCL 9-21A-12