55 ILCS 5/2-4004: Conduct of meetings.

A majority of the members of said board shall constitute a quorum to do business, and, in the absence of the chairman, a chairman pro tem may be appointed. The board shall sit with open doors, and all persons may attend their meetings. The vote on all propositions to appropriate money from the county treasury shall be taken by "ayes" and "nays" and entered on the record of the meeting.