15 ILCS 505/10

The Treasurer shall not pay out of the treasury any money, except upon the warrant of the State Comptroller, provided that warrants shall not be required where payments are made by the Comptroller: (1) to providers of community-based mental health services; (2) to persons receiving benefit payments under the State pension systems; (3) to individuals receiving assistance under Article III of the Illinois Public Aid Code; (4) to a public agency as defined in the Public Funds Investment Act; or (5) by direct deposit or by the electronic transfer of funds. These payments, however, shall only be made upon the approval of the Treasurer, in the form and method provided by the rules or regulations adopted under Section 9.03 of the State Comptroller Act.