The board shall hold regular monthly meetings on the second Tuesday of each month and other meetings at such times and places as its members may elect, and the chairman of the board or any two members may call a meeting at any time he or they consider that the business demands that a meeting be held. The chairman and one member or any two members of the board shall constitute a quorum. A true record of all the proceedings of all meetings of the board shall be kept by the secretary. At the call of any member, the vote on any pending question shall be taken by ayes and nayes, and the same shall be entered on the record. The record of the proceedings of said board shall be open to any member of the governing body and to the public at all times, and a copy from said record, certified by the secretary, shall be competent evidence in all courts.