Prior to the hearing, the Administrative Law Judge may issue an order based on the contents of the parties' memoranda filed pursuant to paragraph (a)(1) of this section, which, unless modified to prevent injustice, shall control the scope of matters to be tried at the oral hearing. If any change in the time or place of the hearing becomes necessary, it shall be made by the Administrative Law Judge, who, in such event, shall file with the Proceedings Clerk a notice of the change. Such notice shall be served upon the parties, unless it is made during the course of an oral hearing and made a part of the transcript. Hearings shall proceed expeditiously and, absent extraordinary circumstances, shall be held in one location and shall continue, without suspension, until concluded.
17 C.F.R. §12.312