Okla. Stat. tit. 18, § 441-815 – Quorum

(a) Unless the articles of organization provide for a greater number, a majority of the total number of directors specified by the organic rules constitutes a quorum for a meeting of the directors.
(b) If a quorum of the board of directors is present at the beginning of a meeting, any action taken by the directors present is valid even if withdrawal of directors originally present results in the number of directors being fewer than the number required for a quorum.
(c) A director present at a meeting but objecting to notice under paragraph (1) or (2) of subsection (b) of Section 79 of this act does not count toward a quorum.
Historical Data Laws 2009, HB 2148, c. 68, § 80, eff. January 1, 2010.