(20 ILCS 1815/2) (from Ch. 129, par. 230)
    Sec. 2. Whenever the Governor as Commander-in-Chief of the military forces of the State, deems it necessary or advisable for the purpose of executing the laws of the State, or of preventing actual or threatened violation thereof, such as suppressing actual or threatened insurrection, invasion, tumult, riots, or mobs, or when the nation is at war and a requisition or order has been made, or is likely to be made, by the President of the United States calling the National Guard, or parts thereof, into the National service, or for any other emergency, the Governor may issue a proclamation or call for volunteer companies, battalions, regiments, brigades, or other units of land and air forces to be known as the Illinois State Guard which shall be formed and organized from the unorganized militia of the State, consisting of all able-bodied citizens between the ages of 18 and 45 years, and of other able-bodied citizens between the ages of 45 and 55 years, as enlisted personnel, and of commissioned officers and warrant officers, when made necessary by an emergency.
(Source: P.A. 85-1241.)