(a) Unless provided otherwise in the articles of incorporation or the bylaws, a bylaw that fixes a greater quorum or voting requirement for the board of directors: (1) May be adopted, amended, or repealed by the shareholders only by the affirmative vote of a majority of the votes entitled to be cast; or (2) May be adopted, amended, or repealed by the directors only by a majority of the entire board of directors. (b) A bylaw adopted or amended by the shareholders that fixes a greater quorum or voting requirement for the board of directors may provide that it may be amended or repealed only by a specified vote of either the shareholders or the board of directors. (Code 1981, § 14-2-1022, enacted by Ga. L. 1988, p. 1070, § 1.)