Illinois Statutes Chapter 40. Pensions § 5/14-123. Occupational disability benefits

(a) application is made after the date that such disability results in the loss of pay, or after the date that the Illinois Workers' Compensation Commission rules on the application for an occupational disability, or after the occurrence of disablement if an occupational disease; and

(b) proper proof is received from one or more licensed health care professionals designated by the Board certifying that the member is mentally or physically incapacitated.

The benefit shall be 75% of the member's final average compensation at date of disability and shall be payable until the first of the following dates occurs:

At the end of the month in which the benefits cease as prescribed in paragraphs (3) or (4) above, if the member is still disabled, he shall become entitled to a retirement annuity and the minimum period of service prescribed for the receipt of such annuity shall be waived.

In the event that a temporary disability benefit has been received, the benefit paid under this Section shall be subject to adjustment by the Board under Section 14-123.1.

The Board shall prescribe rules and regulations governing the filing of claims for occupational disability benefits, and the investigation, control and supervision of such claims.