S.D. Codified Laws § 11-8-52
No public official or employee of a municipality, or board or commission thereof, and no commissioner or employee of a housing authority or urban renewal agency, which has been vested by a municipality with urban renewal powers under §§ 11-8-38 and 11-8-39, shall voluntarily acquire any personal interest, direct or indirect, in any urban renewal project, or in any property included or planned to be included in any urban renewal project of such municipality or in any contract or proposed contract in connection with such urban renewal project. Where such acquisition is not voluntary, the interest acquired shall be immediately disclosed in writing to the local governing body and such disclosure shall be entered upon the minutes of the governing body. Any violation of the provisions of this section shall constitute misconduct in office.
SDCL 11-8-52