(a) Time for filing answering brief. Within thirty days after service of the appeal brief, the National Futures Association shall file with the Proceedings Clerk an answering brief.

(b) Contents of answering brief. The contents of the answering brief generally shall be consistent with those set forth in § 171.25(b) but may omit a statement of the issues and a statement of the case if the National Futures Association does not dispute the issues or the statement of the case contained in the appeal brief.

(c) Length of the answering brief. Without prior leave of the Commission, the answering brief may not exceed thirty five pages, exclusive of any table of contents, table of cases, index and appendix containing transcripts of testimony, exhibits, statutes, rules, regulations or similar materials.