For the purpose of discovering violations of this Act or securing information lawfully required by it, the Department may at any time investigate the business and examine the books, accounts, records, and files of any person acting as a sales finance agency without a license.
In connection with this investigation the Department may examine witnesses under oath and subpoena the production of books and papers pertinent to the investigation. The Director may administer oaths in these investigations or at any hearing held under this Act.
205 ILCS 660/11