To accomplish the objectives and to carry out the duties prescribed by this Act, the Attorney General, in addition to other powers conferred upon him by this Act, may issue subpoenas to any person, administer an oath or affirmation to any person, conduct hearings in aid of any investigation or inquiry, prescribe such forms and promulgate such rules and regulations as may be necessary, which rules and regulations shall have the force of law. To accomplish the objectives and to carry out the duties prescribed by this Act, the State's Attorney of any county may issue subpoenas to any person.
815 ILCS 505/4