A member entitled to vote may vote in person or, unless the articles of incorporation or the bylaws otherwise provide, may vote by proxy executed in writing by the member or by his duly authorized attorney in fact. No proxy shall be valid after eleven months from the date of its execution, unless otherwise provided in the proxy. Except as otherwise provided in the articles of incorporation or bylaws, any action that may be taken at any annual, regular, or special meeting of members may be taken without a meeting if the corporation delivers a ballot to every member entitled to vote on the matter. Each ballot must:
Unless otherwise provided in the articles of incorporation or bylaws, approval by ballot, pursuant to this section, of action other than election of directors is valid only when the number of votes cast by ballot equals or exceeds the quorum required to be present at a meeting authorizing the action, and the number of approvals equals or exceeds the number of votes that would be required to approve the matter at a meeting at which the total number of votes cast was the same as the number of votes cast by ballot. Except as otherwise provided in the articles of incorporation or bylaws, a ballot may not be revoked.
SDCL 47-23-9