70 ILCS 1860/16
The Governor shall appoint 6 members of the Board and the Mayor of the cities of Venice, Madison and Granite City shall each appoint one member of the Board, for a total of 9 Board members. Within 60 days after the effective date of this amendatory Act of the 98th General Assembly, the Governor shall appoint 2 members residing in the area north of the Cahokia Diversion Canal to represent that area, with one member appointed for an initial term expiring May 31, 2016 and one member appointed for an initial term expiring May 31, 2017. The number of Board members appointed by the Governor from the area north of the Cahokia Diversion Canal shall remain at 2 members until such time that the gross operating revenues from the area north of the Cahokia Diversion Canal exceeds 33% of the Port District's total gross operating revenue, as certified by the Port District's certified public accountant. When the gross operating revenue exceeds this amount, the Governor shall, upon the expiration of their term, replace a Board member who resides in the area south of the Cahokia Diversion Canal with an appointee that resides to the north of the Cahokia Diversion Canal, for a total of 3 members who reside in the area north of the Cahokia Diversion Canal. When the gross operating revenue exceeds 45% of the Port District's total gross operating revenue, as certified by the Port District's certified public accountant, the Governor shall replace a Board member who resides in the area south of the Cahokia Diversion Canal, upon the expiration of their term, with an appointee that resides to the north of the Cahokia Diversion Canal, for a total of 4 members who reside in the area north of the Cahokia Diversion Canal. In no case shall there be more than 2 members appointed by the Governor from the area to the south or to the north of the Cahokia Diversion Canal whose terms expire in the same year. At the expiration of the term of any member, the member's successor shall be appointed by the Governor or the respective Mayor in the same manner as the original appointment. No more than 4 members may reside in the area north of the Cahokia Diversion Canal.
After the expiration of initial terms, each successor shall hold office for the term of 3 years from the first day of June of the year in which the term of office commences. In the case of a vacancy during the term of office of any member appointed by the Governor, the Governor shall make an appointment for the remainder of the term vacant and until a successor is appointed and qualified. In case of a vacancy during the term of office of any member appointed by a Mayor, the proper Mayor shall make an appointment for the remainder of the term vacant and until a successor is appointed and qualified. The Governor and each Mayor shall certify their respective appointments to the Secretary of State. Within 30 days after certification of his appointment, and before entering upon the duties of his office, each member of the Board shall take and subscribe the constitutional oath of office and file it in the office of the Secretary of State.
70 ILCS 1860/16