Section 40 ILCS 5/17-117 - Disability retirement pension(a) The conditions prescribed in items 1 and 2 in Section 17-116 for computing service retirement pensions shall apply in the computation of disability retirement pensions. (1) Each teacher retired or retiring after 10 years of service and with less than 20 years of service because of permanent disability not incurred as a proximate result of the performance of duty shall receive a disability retirement pension equal to 2.2% of average salary for each year of service after June 30, 1998 and for each year of service on or before that date that has been augmented under Section 17-119.1 and 1 2/3% of average salary for each year of other service.(2) If the total service is 20 years and less than 25 years and the teacher's age is under 55, the disability retirement pension shall equal a service retirement pension discounted 1/2 of 1% for each month the age of the contributor is less than 55 down to a minimum age of 50 years, provided the disability retirement pension so computed shall not be less than the amount payable under paragraph 1.(3) If the total service is 20 years or more and the teacher has attained age 55, and is under age 60, a disability retirement pension shall equal a service retirement pension without discount.(4) If the total service is 25 years or more regardless of age, a disability pension shall equal a service retirement pension without discount.(5) If the total service is 20 years or more and the teacher is age 60 or over, a service retirement pension shall be payable.(b) For disability retirement pensions, the following further conditions shall apply: (1) Written application shall be submitted within 3 years from the date of separation.(2) The applicant shall submit to examination by physicians appointed by the Board within one year from the date of their appointment.(3) Two physicians, appointed by the Board, shall declare the applicant to be suffering from a disability which wholly and presumably permanently incapacitates him for teaching or for service as an employee of the Board. In the event of disagreement by the physicians, a third physician, appointed by the Board, shall declare the applicant wholly and presumably permanently incapacitated.(c) Disability retirement pensions shall begin on the effective date of resignation or the day following the close of the payroll period for which credit was validated, whichever is later. P.A. 90-32; eff. 6/27/1997; 90-566, eff. 1/2/1998; 91-887, eff. 7/6/2000.