50 ILCS 110/1
The General Assembly finds and declares that questions raised regarding the legality of simultaneously holding the office of county board member and township supervisor are unwarranted, and in counties of less than 100,000 population such questions regarding the legality of simultaneously holding the office of county board member and township trustee are unwarranted; that the General Assembly viewed the office of township supervisor, and in counties of less than 100,000 population the office of township trustee, and the office of county board member as compatible; and that to settle the question of legality and avoid confusion among such counties and townships as may be affected by such questions it is lawful to hold the office of county board member simultaneously with the office of township supervisor, and in counties of less than 100,000 population with the office of township trustee, in accordance with Sections 2 and 3 .
50 ILCS 110/1