SDCL § 47-23-23: Articles or bylaws as governing vote of directors.

Whenever, with respect to any action to be taken by the members or directors of a corporation, the articles of incorporation or bylaws require the vote or concurrence of a greater proportion of the directors or members or any class of members than required by chapters 47-22 to 47-28, inclusive, the provisions of the articles of incorporation or bylaws shall control.