70 ILCS 3505/6
The governing body of the Authority shall be the Board of Directors. The president of the board of trustees of the conservation district of an eligible county or, if a county forest preserve district oversees the member county's prairie pathways and bicycle trails, the forest preserve president, of each member county shall appoint one director to the Board. One additional director shall be appointed in like manner from a county for each 300,000 in population that the county's population exceeds 300,000. All directors shall serve at the pleasure of the appointing authority. Directors shall receive no compensation but shall be reimbursed for their actual expenses. The Board shall elect a chairman from among its membership and shall meet from time to time at scheduled meetings or at the call of the chair.
A majority of the directors shall constitute a quorum and the affirmative vote of at least a majority of the directors shall be necessary for the authorization of any business transacted by the Board.
70 ILCS 3505/6