Section 45 ILCS 35/25 - Board of commissioners; Appointment(a) The Authority established under this Act shall be governed by a board of commissioners appointed as provided in subsection (b). The appointment of the commissioners shall be made in writing and shall indicate the legal residence of each appointee.(b) The board of commissioners of the Authority shall consist of 16 members, eight of whom shall be residents of the metropolitan area of each state that is a party to the Authority. At least 4 but not more than 5 members appointed from each metropolitan area shall be elected city or county officers. The mayor of each city having a population of at least 80,000 within the metropolitan area shall appoint, with the consent of the city council, 4 members to the board of commissioners. The mayor of each city having a population of at least 40,000, but less than 80,000, within the metropolitan area shall appoint, with the consent of the city council, 2 members to the board of commissioners. The mayor of each city having a population of at least 19,000, but less than 40,000, within the metropolitan area shall appoint, with the consent of the city council, one member to the board of commissioners. The remaining members appointed from each state shall be appointed by the chairperson of the governing body of the county within the metropolitan area, with consent of the governing body, from cities having populations less than 19,000 and areas outside the corporate limits of cities.(c) If a city increases to a population that would enable an additional appointment to be made, a member appointed by the chairperson of the governing body of the county and having the least tenure shall be removed from the board of commissioners. If a city decreases to a population warranting fewer members, the appointee having the least tenure of that city shall be removed from the board of commissioners and the chairperson of the governing body of the county in which that city is located shall make a new appointment as provided in subsection (b). If more members than are required to be removed have the same tenure, the member to be removed shall be determined by lot.(d) The membership of the board of commissioners shall be gender balanced if possible. The appointing authorities shall strive for gender balance on the board and shall comply with similar laws of the state of Iowa as determined by the appointing authorities. The appointing authorities shall also provide representation for racial groups residing in the metropolitan area based on the ratio of the racial population to the population as a whole.