Section 735 ILCS 5/3-108 - Pleadings and record on review(a) Complaint. The complaint shall contain a statement of the decision or part of the decision sought to be reviewed. It shall specify whether the transcript of evidence, if any, or what portion thereof, shall be filed by the agency as part of the record. Upon motion of any defendant, or upon its own motion, the court may require of the plaintiff a specification of the errors relied upon for reversal.(b) Answer. Except as herein otherwise provided, the administrative agency shall file an answer which shall consist of the original or a certified copy of the entire record of proceedings under review, including such evidence as may have been heard by it and the findings and decisions made by it. By order of court or by stipulation of all parties to the review, the record may be shortened by the elimination of any portion thereof. If the complaint specifies that none or only a part of the transcript of evidence shall be filed as part of the answer and if the administrative agency or any other defendant objects thereto, the court shall hear the parties upon this question and make a finding as to whether all, or if less than all, what parts of the transcript shall be included in the answer. No pleadings other than as herein enumerated shall be filed by any party unless required by the court.(c) Record after remandment. If the cause is remanded to the administrative agency and a review shall thereafter be sought of the administrative decision, the original and supplemental record, or so much thereof as shall be determined by court order or the stipulation of all the parties, shall constitute the record on review.