SDCL § 9-21-9: Expenditures limited to appropriated amounts.

Neither the governing body nor any department or officer of the municipality shall add to the municipal expenditures in any fiscal year any sum in excess of the amount provided for in the annual appropriation ordinance except as otherwise specially provided. Nor shall the amount spent for any purpose or any department exceed the total amount appropriated for such purpose or for such department in the annual appropriation ordinance for such year, except as otherwise specially provided.