20 ILCS 1805/14

The Commander-in-Chief shall appoint from the active officers of the Illinois National Guard, the Adjutant General, with the grade of Major General. The appointment of the Adjutant General shall be for a term expiring on the 3rd Monday in January, 1971, and in each odd-numbered year thereafter. The Adjutant General shall serve as both the Director of the Department of Military Affairs and as the Commander of the Illinois National Guard.