S.D. Codified Laws § 8-10-7
It shall be unlawful for the officers of any civil township, unless specially and expressly authorized by law, to contract any debt or incur any pecuniary liability for the payment of either the principal or interest for which, during the current year or any subsequent year, it will be necessary to levy on the taxable property of such township, a higher rate of tax than the maximum rate prescribed by law; and every contract made in contravention of the provisions of this section shall be null and void in regard to any obligation imposed on the corporation on behalf of which such contract purports to be made; but every such officer, who makes or participates in making or authorizes the making of any such contract, shall be held individually liable for its performance; and every such officer present when any such unlawful contract was made or authorized to be made, shall be deemed to have made or to have participated in making, or to have authorized the making of the same, as the case may be, unless he dissented therefrom and entered or caused to be entered such dissent on the records of such township.
SDCL 8-10-7