Illinois Labor Codes 19 44

(a) It shall be the duty of the Commission upon notification that the parties have failed to reach an agreement, to designate an Arbitrator.

1. Whenever any claimant misconceives his remedy and files an application for adjustment of claim under this Act and it is subsequently discovered, at any time before final disposition of such cause, that the claim for disability or death which was the basis for such application should properly have been made under the Workers' Occupational Diseases Act, then the provisions of Section 19, paragraph (a-1) of the Workers' Occupational Diseases Act having reference to such application shall apply.

2. Whenever any claimant misconceives his remedy and files an application for adjustment of claim under the Workers' Occupational Diseases Act and it is subsequently discovered, at any time before final disposition of such cause that the claim for injury or death which was the basis for such application should properly have been made under this Act, then the application so filed under the Workers' Occupational Diseases Act may be amended in form, substance or both to assert claim for such disability or death under this Act and it shall be deemed to have been so filed as amended on the date of the original filing thereof, and such compensation may be awarded as is warranted by the whole evidence pursuant to this Act. When such amendment is submitted, further or additional evidence may be heard by the Arbitrator or Commission when deemed necessary. Nothing in this Section contained shall be construed to be or permit a waiver of any provisions of this Act with reference to notice but notice if given shall be deemed to be a notice under the provisions of this Act if given within the time required herein.

Powers of Arbitrator-Immediate Hearings (b) The Arbitrator shall make such inquiries and investigations as he or they shall deem necessary and may examine and inspect all books, papers, records, places, or premises relating to the questions in dispute and hear such proper evidence as the parties may submit.

The hearings before the Arbitrator shall be held in the vicinity where the injury occurred after 10 days' notice of the time and place of such hearing shall have been given to each of the parties or their attorneys of record.

The Arbitrator may find that the disabling condition is temporary and has not yet reached a permanent condition and may order the payment of compensation up to the date of the hearing, which award shall be reviewable and enforceable in the same manner as other awards, and in no instance be a bar to a further hearing and determination of a further amount of temporary total compensation or of compensation for permanent disability, but shall be conclusive as to all other questions except the nature and extent of said disability.

The decision of the Arbitrator shall be filed with the Commission which Commission shall immediately send to each party or his attorney a copy of such decision, together with a notification of the time when it was filed. Beginning January 1, 1981, all decisions of the Arbitrator shall set forth in writing findings of fact and conclusions of law, separately stated. Unless a petition for review is filed by either party within 30 days after the receipt by such party of the copy of the decision and notification of time when filed, and unless such party petitioning for a review shall within 35 days after the receipt by him of the copy of the decision, file with the Commission either an agreed statement of the facts appearing upon the hearing before the Arbitrator, or if such party shall so elect a correct transcript of evidence of the proceedings at such hearings, then the decision shall become the decision of the Commission and in the absence of fraud shall be conclusive. The Petition for Review shall contain a statement of the petitioning party's specific exceptions to the decision of the arbitrator. The jurisdiction of the Commission to review the decision of the arbitrator shall not be limited to the exceptions stated in the Petition for Review. The Commission, or any member thereof, may grant further time not exceeding 30 days, in which to file such agreed statement or transcript of evidence. Such agreed statement of facts or correct transcript of evidence, as the case may be, shall be authenticated by the signatures of the parties or their attorneys, and in the event they do not agree as to the correctness of the transcript of evidence it shall be authenticated by the signature of the Arbitrator designated by the Commission.