The board shall hold at least one annual meeting, which shall be held between the fifteenth day of May and the fifteenth day of July each year. Each year the board shall elect a president and a vice-president from its membership and a secretary who shall not be required to be a dentist. The terms of such offices shall be for one year and until their successors are elected. Special meetings of the board may be called by the president or any three members of the board, at any time, upon giving five days written notice to the members thereof. Written notice may be waived by unanimous consent by the members. A majority of the board shall constitute a quorum for the transaction of all business coming before the board and all proceedings of the board shall be recorded in a permanently bound minute book.