40 ILCS 5/19-113
Any person who has contributed to said fund for a period of 3 years or more may retire from the service of said house of correction on account of serious disability rendering him or her unable to properly discharge his or her duties. If such disability is incurred as the result of the performance of any act or acts of duty, such disabled person shall be entitled to receive an amount equal to 75% of salary as salary is defined in Section 19--101 of this Division, until such person shall recover from such disability or shall attain an age of 65 years, at which time he shall retire from the service and be entitled to receive a pension as provided for in Section 19--109 of this Division. If such disability shall not be the result of the performance of an act or acts of duty, and is not due to alcoholism or pregnancy, such person shall be entitled to receive ordinary disability pension in the amount of 44% of said contributor's salary per month for a period of time equal to 1/2 of his period of service, but not to exceed 5 years.
Neither duty disability pension nor ordinary disability pension shall be paid to any contributor to this fund after such contributor has attained the age of 65 years; provided, however, that any person in receipt of ordinary disability pension or duty disability pension from this fund, if he shall still be disabled upon attainment of age 65 and shall have a period of service of 10 years or more (which period of service shall consist of actual service plus the period of time such person received disability pension,) shall be retired upon the annuity provided for in Section 19--109 of this Division.
In the event any person receiving ordinary disability pension shall continue to be disabled after the expiration of the period of time for which he shall be entitled to receive disability pension, and before the attainment by such person of the age of 55 years, such person shall be entitled to retire upon the annuity provided for in Section 19--109 of this Division as though such disabled person had attained 55 years of age; provided, if such annuity shall be less than $300 per year, the employee concerned may, at his option, in lieu of such annuity, withdraw the contributions he shall have made to the fund together with the interest thereon. Such disabled person must be found to be disabled and unable to discharge the duties of his position upon an examination made by a physician appointed by the board of trustees. During the period any person is in receipt of ordinary disability pension, such person shall continue to make the contributions provided under Section 19--101 of this Division. When such disabled person shall have recovered from such disability he or she shall be removed from the disability roll and shall be restored to his or her position in the service.
40 ILCS 5/19-113