Where a case has been assigned to a Commissioner, either party, upon notice to the other party, may make application to the Commissioner for an extension of time within which to file any pleadings, documents, abstracts or briefs. A party filing such a motion shall submit therewith 3 copies of a proposed order. In all other cases such application for extension of time shall be made to the Court.
Ill. Admin. Code tit. 74, § 790.190