A board of directors must consist of three or more individuals, with the number specified in or fixed in accordance with the articles or bylaws. Notwithstanding section 317A.227, if the power to elect or appoint directors is vested in the board of directors and if the number of directors is fewer than three, or such greater minimum number set forth in the articles or bylaws, a majority of the directors in office may appoint or elect the number of additional directors necessary to increase the board to three directors or such greater minimum set forth in the articles or bylaws.