S.D. Codified Laws § 7-16-19
Current with legislation signed by the governor on or before 3/6/2024
In any county of over fifty thousand population and any other county where the board of county commissioners so designates, the state's attorney shall be a full-time position and the state's attorney may not be counsel or attorney in any action, civil or criminal, in the courts of this state except when acting on behalf of the county or the State of South Dakota.
SDCL 7-16-19