(a) The presiding officer shall fix the time and manner of filing briefs and any enlargement of time. The period of time allowed shall be the same for all parties unless the presiding officer, for good cause shown, directs otherwise.
(b) Briefs shall be served upon all parties pursuant to subpart H of this part.
(c) In investigations instituted on the Commission's own motion, the presiding officer may require the Bureau of Enforcement to file a request for findings of fact and conclusions within a reasonable time prior to the filing of briefs. Service of the request shall be in accordance with the provisions of subpart H of this part.
(d) Unless otherwise ordered by the presiding officer, opening or initial briefs shall contain the following matters in separately captioned sections: (1) Introductory section describing the nature and background of the case, (2) proposed findings of fact in serially numbered paragraphs with reference to exhibit numbers and pages of the transcript, (3) argument based upon principles of law with appropriate citations of the authorities relied upon, and (4) conclusions.
(e) All briefs shall contain a subject index or table of contents with page references and a list of authorities cited.
(f) All briefs filed pursuant to this section shall ordinarily be limited to eighty (80) pages in length, exclusive of pages containing the table of contents, table of authorities, and certificate of service, unless the presiding officer allows the parties to exceed this limit for good cause shown and upon application filed not later than five (5) days before the time fixed for filing of such a brief or reply. [Rule 221.]