Ill. Admin. Code tit. 83, § 762.120
a) For proceedings subject to this Part that were initiated prior to January 1, 2000, an original and eight paper copies of all comments and draft proposed decisions shall be filed with the Commission. Comments shall be concise, and, if in excess of 20 pages, excluding appendices, shall contain:
(Source: Amended at 24 Ill. Reg. 15934, effective October 15, 2000)