17 C.F.R. § 201.53 Reply.
Title 17 - Commodity and Securities Exchanges
Within 15 days after service of an answer, the applicant may file a reply. If the reply is based on any alleged facts not already in the record of the proceeding, the applicant shall include with the reply either supporting affidavits or a request for further proceedings under §201.55.
Title 17: Commodity and Securities Exchanges
PART 201—RULES OF PRACTICE
Subpart B—Regulations Pertaining to the Equal Access to Justice Act
§ 201.53 Reply.

