110 ILCS 510/15

The expense of the building, improving, repairing and supplying fuel and furniture and the necessary appliances and apparatus for conducting said school, and the salaries or compensation of the Board of Trustees of Southern Illinois University, superintendent, assistants, agents and employees, shall be a charge upon the State Treasury; all other expenses shall be chargeable against pupils, and the board of Trustees of Southern Illinois University shall regulate the charges accordingly.