40 ILCS 5/4-112
A disability pension shall not be paid until disability has been established by the board by examinations of the firefighter at pension fund expense by 3 physicians selected by the board and such other evidence as the board deems necessary. The 3 physicians selected by the board need not agree as to the existence of any disability or the nature and extent of a disability. Medical examination of a firefighter receiving a disability pension shall be made at least once each year prior to attainment of age 50 in order to verify continuance of disability, except that a medical examination of a firefighter receiving a disability pension for post-traumatic stress disorder (PTSD) related to his or her service as a firefighter shall not be made if: (1) the firefighter has attained age 45; (2) the firefighter has provided to the board documentation approving the discontinuance of the medical examination from at least 2 physicians; and (3) at least 4 members of the board have voted in the affirmative to allow the firefighter to discontinue the medical examination. No examination shall be required after age 50. No physical or mental disability that constitutes, in whole or in part, the basis of an application for benefits under this Article may be used, in whole or in part, by any municipality or fire protection district employing firefighters, emergency medical technicians, or paramedics as cause for discharge.
Upon satisfactory proof to the board that a firefighter on the disability pension has recovered from disability, the board shall terminate the disability pension. The firefighter shall report to the marshal or chief of the fire department, who shall thereupon order immediate reinstatement into active service, and the municipality shall immediately return the firefighter to its payroll, in the same rank or grade held at the date he or she was placed on disability pension. If the firefighter must file a civil action against the municipality to enforce his or her mandated return to payroll under this paragraph, then the firefighter is entitled to recovery of reasonable court costs and attorney's fees.
The firefighter shall be entitled to 10 days notice before any hearing or meeting of the board at which the question of his or her disability is to be considered, and shall have the right to be present at any such hearing or meeting, and to be represented by counsel; however, the board shall not have any obligation to provide such fireman with counsel.
40 ILCS 5/4-112