70 ILCS 1837/100
The Governor shall appoint 4 members of the Board and the Mayor shall appoint 3 members of the Board. All initial appointments shall be made within 60 days after this Act takes effect. Of the 4 members initially appointed by the Governor, 2 shall be appointed for initial terms expiring January 1, 2017, one for an initial term expiring January 1, 2013, and one for an initial term expiring January 1, 2012. Of the 3 members initially appointed by the Mayor, one shall be appointed for an initial term expiring January 1, 2017, one for an initial term expiring January 1, 2013, and one for an initial term expiring January 1, 2012. At the expiration of the term of any member, his or her successor shall be appointed by the Governor or the Mayor, respectively, as in the case of appointments for the initial terms.
After the expiration of initial terms, each successor shall hold office for a term of 3 years beginning the first day of January 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 the Mayor, the Mayor shall make an appointment for the remainder of the term vacant and until a successor is appointed and qualified. The Governor and Mayor shall certify their respective appointments to the Secretary of State. Within 30 days after certification of his or her appointment, and before entering upon the duties of his or her 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 1837/100