Within 60 days after September 3, 1985 (the effective date of Article 6 of Public Act 84-245), the Jo Daviess County Board shall appoint 9 members of the Jo Daviess County Civic Center Board, 3 members to be appointed for terms of 1 year, 3 members to be appointed for terms of 2 years, and 3 members to be appointed for terms of 3 years, such terms commencing on the date each is appointed. At the expiration of the term of any member, his successor shall be appointed by the Jo Daviess County Board in like manner. All successors shall hold office for a term of 3 years from the date of appointment, except in case of an appointment to fill a vacancy.