225 ILCS 130/100

(a) The Department may subpoena and bring before it any person to take the oral or written testimony or compel the production of any books, papers, records, or any other documents that the Secretary or his or her designee deems relevant or material to any investigation or hearing conducted by the Department, with the same fees and mileage and in the same manner as prescribed by law in judicial proceedings in civil cases in circuit courts of this State. (b) The Secretary, the hearing officer, or a certified shorthand court reporter may administer oaths at any hearing that the Department conducts. Notwithstanding any other statute or Department rule to the contrary, all requests for testimony, production of documents, or records shall be in accordance with this Act.