620 ILCS 5/58
In case of appeal from any rule, ruling, regulation, order or decision of the Department, a transcript of such testimony, together with all exhibits or copies thereof introduced and all information secured by the Department on its own initiative and considered by it in rendering its order or decision (and required by the laws of this State pertaining to aeronautics to be made a part of its records), and of the pleadings, records and proceedings in the case, shall constitute the record of the Department: provided, that on appeal from an order or decision of the Department, the person, municipality or other political subdivision taking the appeal and the Department may stipulate that a certain question or certain questions alone and a specified portion only of the evidence shall be certified to the court for its judgment, whereupon such stipulation and the question or questions and the evidence therein specified shall constitute the record on appeal.
620 ILCS 5/58