(35 ILCS 520/14) (from Ch. 120, par. 2164)
    Sec. 14. For the purpose of determining the correctness of any return, determining the amount of tax that should have been paid, determining whether or not the dealer should have made a return or paid taxes, or collecting any taxes under this Act, the Director may examine, or cause to be examined, any books, papers, records, or memoranda, that may be relevant to making such determinations, whether the books, papers, records, or memoranda, are the property of or in the possession of the dealer or another person. The Director may require the attendance of any person having knowledge or information that may be relevant, compel the production of books, papers, records, or memoranda by persons required to attend, take testimony on matters material to the determination, and administer oaths or affirmations. Upon demand of the Director or any examiner or investigator, a circuit court shall issue a subpoena for the attendance of a witness or the production of books, papers, records, and memoranda. Disobedience of subpoenas issued under this Act is punishable by the circuit court which issued the subpoena.
(Source: P.A. 85-663.)