(a)Contents. Any brief filed in a proceeding shall be confined to the particular matters in issue, citing statutes, decisions, and other authorities, and page references to such portions of the record or the recommended decision of the presiding officer as may be relevant.(b)Reply briefs. Reply briefs may be filed within 10 days after service of original briefs of opposing parties, and shall be confined to matters in such briefs. Further briefs may be filed only with permission of the presiding officer or the Board with respect to a matter before the Board.(c)Delayed filing. Briefs not filed on or before the time fixed in this subpart or by the presiding officer will be received only upon special permission of the Board.