Ill. Admin. Code tit. 20, § 2220.40
b) Employees shall verbally report as soon as possible and shall submit a written report within five working days after any:
1) Arrest, indictment or conviction for a felony or a misdemeanor, other than a minor traffic offense such as a parking ticket, to their immediate supervisor. Driving under the influence is a reportable offense. The report shall specify the facts forming the basis for the arrest, indictment, or conviction and the caption of the case.
B) Any employee who is charged and convicted of a felony shall be terminated from employment.
C) Any employee whose order of protection prohibits the possession or use of firearms and is for a length of time exceeding 90 days and who may be required to possess, transport, or receive a weapon or ammunition in the performance of his or her duties shall be terminated from employment.
3) Admission as an inpatient in a mental hospital, if the employee is authorized to carry a firearm.