(a) Unless the certificate of incorporation or bylaws provide otherwise, regular meetings of the board of directors may be held without notice of the place, if any, date, time, or purpose of the meeting.
(b) Unless the certificate of incorporation or bylaws provide for a longer or shorter period, special meetings of the board of directors shall be preceded by at least two days’ notice of the place, if any, date, time of the meeting. The notice need not describe the purpose of the special meeting unless required by the certificate of incorporation or bylaws.