The board shall hold a regular monthly meeting on the second Monday of each month, or such other day of the month as subsequently determined by the board, at the principal offices of the board. Special meetings may be held at the call of the chair of the board or upon the request of any two members of the board. The chair 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 and the vote shall be entered on the record. The record of the proceedings of the board shall be open to the mayor, any member of the city council, and to the public at all times, and a copy of the record or any excerpt thereof, certified by the secretary, shall be competent evidence in all courts.