29 C.F.R. § 458.86
Any party desiring to submit a brief to the Administrative Law Judge shall file the original within ten (10) days after the close of the hearing: Provided, however, That prior to the close of the hearing and for good cause, the Administrative Law Judge may grant a reasonable extension of time. Copies of such brief shall be served on all of the parties to the proceeding. Requests for additional time in which to file a brief under authority of this section made after the hearing shall be made in writing to the Administrative Law Judge and copies thereof served on the other parties. A statement of such service shall be furnished. A request for extension of time shall be received not later than three (3) days before the date such briefs are due. In the absence of the Administrative Law Judge such requests shall be ruled upon by the Chief Administrative Law Judge. No reply brief may be filed except by permission of the Administrative Law Judge.
29 C.F.R. §458.86