Illinois Statutes Chapter 15. Executive Officers § 5/1. Governor; succession in office

§ 1. (a) In the event that the Governor, for any of the reasons specified in Article V, Section 6 of the Constitution of the State of Illinois, is not able to exercise the powers and discharge the duties of his office, such powers and duties of the office shall be exercised by the officer next in line of succession, in the order named as follows:

(b) The officer next in line of succession shall serve as Governor for the remainder of the term if he succeeds to the office by reason of death, conviction on impeachment or resignation of the Governor. If he succeeds to the office by reason of temporary disability or failure to qualify by the Governor, he shall serve until the Governor qualifies or the disability is removed. An officer who succeeds to the office of Governor by reason of temporary disability of the Governor shall be designated Acting Governor.

(c) If an officer next in line of succession shall fail to qualify or if his office is vacant, then the officer next in line of succession after him who is qualified shall serve as Governor.