Any party may request a rehearing of all or any portion of a case, before the same or a different Administrative Law Judge, by including a written request therefor at the time of filing exceptions or responses as hereinabove provided. Such request shall be supported by a statement of the reasons why such party believes that a rehearing is necessary. A motion for rehearing will be granted by the Commission or a three-member panel only if it determines that substantial justice so requires.
Ill. Admin. Code tit. 56, § 5300.1020
Section 5300.1020 renumbered from Section 5300.920 at 9 Ill. Reg. 6207, effective April 24, 1985