It is determined to be improper that there be any effort by any person interested in a case before the Administration to attempt to sway the judgment of the Administration by undertaking to bring pressure or influence to bear upon the Administration, its staff, or the presiding officer assigned to the proceeding. It is further determined to be improper that such interested persons or any member of the Administration's staff or the presiding officer directly or indirectly give statements to the press or radio, by paid advertisements or otherwise, designed to influence the Administration's judgment in the matter. In addition, it is further determined to be improper that any person solicit communications to the Administration or any of its members, its staff or the presiding officer in the case other than by counsel of record who shall serve copies thereof on all other parties to the proceeding.