Special meetings of the Board of Directors may be called by at the request of the chair, or by any three (3) of the directors in office at that time. Notice of the time, date, place, and purpose of any special meeting of the Board of Directors shall be given by the secretary in accordance with the provisions of Section 5.1 at least twenty-four (24) hours before such meeting; provided that notice shall be given at least seven (7) days prior to any special meeting the purpose of which is to remove a director or to approve a matter which would require the approval of members, if the corporation had members.