35 ILCS 135/21
The Department may make, promulgate and enforce such reasonable rules and regulations relating to the administration and enforcement of this Act as may be deemed expedient.
Whenever notice is required by this Act, such notice may be given by United States certified or registered mail, addressed to the person concerned at his or her last known address, and proof of such mailing shall be sufficient for the purposes of this Act. Notice of any hearing provided for by this Act and held before the Department shall be so given not less than 7 days prior to the day fixed for the hearing.
Hearings provided for in this Act, other than hearings before the Illinois Independent Tax Tribunal, shall be held:
The Circuit Court of the County wherein the hearing is held shall have power to review all final administrative decisions of the Department in administering this Act. The provisions of the Administrative Review Law, as amended, and the rules adopted pursuant thereto, shall apply to and govern all proceedings for the judicial review of final administrative decisions of the Department under this Act. The term "administrative decision" is defined as in Section 3-101 of the Code of Civil Procedure.
Service upon the Director of Revenue or Assistant Director of Revenue of the Department of Revenue of summons issued in any action to review a final administrative decision shall be service upon the Department. The Department shall certify the record of its proceedings if the plaintiff in the action for judicial review shall pay to it the sum of 75 per page of testimony taken before the Department and 25 per page of all other matters contained in such record, except that these charges may be waived where the Department is satisfied that the aggrieved party is a poor person who cannot afford to pay such charges. However, before the delivery of such record to the person applying for it payment of these charges must be made, and if the record is not paid for within 30 days after notice that such record is available, the complaint may be dismissed by the court upon motion of the Department.
No stay order shall be entered by the Circuit Court unless the plaintiff in the action for judicial review files with the court a bond in an amount fixed and approved by the court, to indemnify the State against all loss and injury which may be sustained by it on account of the review proceedings and to secure all costs which may be occasioned by such proceedings.
Whenever any proceeding provided by this Act is commenced before the Department, either by the Department or by a person subject to this Act, and such person thereafter dies or becomes a person under legal disability before such proceeding is concluded, the legal representative of the deceased or a person under legal disability shall notify the Department of such death or legal disability. Such legal representative, as such, shall then be substituted by the Department for such person. If the legal representative fails to notify the Department of his or her appointment as such legal representative, the Department may, upon its own motion, substitute such legal representative in the proceeding pending before the Department for the person who died or became a person under legal disability.
Hearings to protest an administrative decision of the Department conducted as a result of a protest filed with the Illinois Independent Tax Tribunal on or after July 1, 2013 shall be conducted pursuant to the provisions of the Illinois Independent Tax Tribunal Act of 2012.
35 ILCS 135/21