S.D. Codified Laws § 47-30-12

Every director of a corporation, who is present at a meeting of the directors at which any act, proceeding, or omission of such directors in violation of this chapter occurs, is deemed to have concurred therein, unless he at the time causes, or in writing requires, his dissent therefrom to be entered in the minutes of the directors, or if absent from such meeting and the record of such violation appears on the record or minutes of the board of directors and he remains a director for six months thereafter without causing, or in writing requiring his dissent from such violation to be entered in the minutes of the directors.