70 ILCS 1925/5-55

As soon as possible after the appointment of the initial members, the Authority shall organize for the transaction of business, select a chairperson and a temporary secretary from its own number, and adopt bylaws to govern its proceedings. The initial chairperson and successors shall be elected by the Authority from time to time from among the members. The Authority may act through its members by entering into an agreement that a member act on the Authority's behalf, in which instance the act or performance directed shall be deemed to be exclusively of, for, and by the Authority and not the individual act of the member or its represented person.