(a) Briefs shall be addressed to the presiding officer unless the commission determines in any proceeding that briefs shall be addressed directly to it. In that event, references in this section to the presiding officer shall be deemed to refer to the secretary.

(b) The presiding officer shall determine the number of briefs that may be written, the schedule for filing them, and the page limitations if any. Copies of exhibits may be appended to any brief without being charged against a page limitation. The presiding officer may authorize oral argument where he or she finds it warranted and determine the scope of any such argument and the procedures to be followed.

(c) Briefs shall meet the general requirements for documents filed with the secretary, set out in section 3.5 of this Title. In addition, any brief longer than 10 pages (exclusive of exhibits) shall include a table of contents.

(d) Pursuant to section 3.5 of this Title, each brief shall be filed with the secretary, and at the same time be served on each party to the proceeding.