Illinois Statutes Chapter 40. Pensions § 5/8-136. Minimum annuities

(a) $600 a year after the date of withdrawal if he is age 55 or more at such time.

(b) $600 a year after the date he becomes age 55 if he is less than such age when he withdraws.

In addition to the combined age and service and prior service annuities to which an employee is entitled (except one in receipt of pension or annuity from the annuity and benefit fund herein provided for on June 30, 1935), an employee with 35 or more years of service who has attained age 65 or more at the time he withdraws, is entitled to receive a sum equal to the difference between the combined age and service annuity and prior service annuity, and 50% of his highest “actual compensation”, but not in excess of 33 1/3 % of the combined age and service annuity and prior service annuity.