Briefs not filed and served on or before the dates fixed therefor shall not be accepted for filing, except by special permission of the hearing committee or special master. In the case of a formal proceeding that is in the hands of a hearing committee, one copy of each brief shall be served on each member of the committee and one copy shall be filed with the Board Prothonotary. In the case of a formal proceeding that is in the hands of a special master, one copy of each brief shall be served on the special master and one copy shall be filed with the Board Prothonotary. A hearing committee or special master may permit or direct the service of a different number of copies of a brief on the members of the hearing committee or special master.
204 Pa. Code § 89.164