S.D. Codified Laws § 47-23-7
Unless otherwise provided in the articles of incorporation or the bylaws, written notice stating the place, day, and hour of the meeting and, in the case of a special meeting, the purpose or purposes for which the meeting is called, shall be delivered not less than ten nor more than fifty days before the date of the meeting, either personally or by mail, by or at the direction of the president, or the secretary, or the officers or persons calling the meeting, to each member entitled to vote at such meeting. If mailed, such notice shall be deemed to be delivered when deposited in the United States mail addressed to the member at his address as it appears on the records of the corporation, with postage thereon prepaid. If permitted in the articles of incorporation or the bylaws, notice of meetings may be given by any reasonable means including, but not limited to, traditional mail, hand delivery, email, or electronic facsimile.
SDCL 47-23-7