Any person who has received a subpoena issued under subsection (b) may file in the appropriate circuit court, and serve upon the Attorney General, a petition for a court order to modify or set aside the subpoena or other request. The petition must be filed either: (1) within 20 days after the date of service of the subpoena or at any time before the return date specified in the subpoena, whichever date is earlier, or (2) within a longer period as may be prescribed in writing by the Attorney General.
The petition shall specify each ground upon which the petitioner relies in seeking relief under this subsection and may be based upon any failure of the subpoena to comply with the provisions of this Section or upon any constitutional or other legal right or privilege of the petitioner. During the pendency of the petition in the court, the court may stay, as it deems proper, the running of the time allowed for compliance with the subpoena or other request, in whole or in part, except that the petitioner shall comply with any portion of the subpoena or other request not sought to be modified or set aside.
330 ILCS 45/9.1