40 ILCS 5/3-114.2
A police officer who becomes disabled as a result of any cause other than the performance of an act of duty, and who is found to be physically or mentally disabled so as to render necessary his or her suspension or retirement from police service in the police department, shall be entitled to a disability pension of 50% of the salary attached to the officer's rank on the police force at the date of suspension of duty or retirement.
If a police officer on disability pension dies while still disabled, the disability pension shall continue to be paid to the officer's survivors in the sequence provided in Section 3-112.
From and after July 1, 1987, any pension payable under this Section shall be at least $400 per month, without regard to the fact that the disability or death of the police officer occurred prior to that date. If the minimum pension established in Section 3-113.1 is greater than the minimum provided in this Section, the Section 3-113.1 minimum controls.
40 ILCS 5/3-114.2