Unless the articles of incorporation or bylaws require a greater number or unless otherwise specifically provided in this chapter, a quorum of a board of directors consists of:
The articles of incorporation or bylaws may authorize a quorum of a board of directors to consist of no fewer than one-third of the fixed or prescribed number of directors determined under this section. If a quorum is present when a vote is taken, the affirmative vote of a majority of directors present is the act of the board of directors unless the articles of incorporation or bylaws require the vote of a greater number of directors.
SDCL 47-1A-824