No standing rule or order of the board as herein adopted may be rescinded, or changed, nor any new rule or order added hereto except by amendment to this ordinance by a two-thirds vote. Any such proposed ordinance changes in the rules or orders of the board shall be mailed to the board members at least three (3) days before the meeting at which it is to be presented for the first reading. Any Rule not in conflict with state statutes may be suspended by a two-thirds vote of the members present.