17 C.F.R. § 249.11
This form shall be used by each national securities exchange to report to the Commission within ten business days after the end of every month the aggregate dollar amount of sales of securities that occurred on the exchange, had a charge date in the month of the report, and are subject to fees pursuant to section 31(b) of the Act (15 U.S.C. 78ee ) and § 240.31 of this chapter; and the total number of round turn transactions in security futures that occurred on the exchange, had a charge date in the month of the report, and are subject to assessments pursuant to section 31(d) of the Act and § 240.31 of this chapter. This form also shall be used by a national securities association to report to the Commission within ten business days after the end of every month the aggregate dollar amount of sales of securities that occurred by or through a member of the association otherwise than on a national securities exchange, had a charge date in the month of the report, and are subject to fees pursuant to section 31(c) of the Act and § 240.31 of this chapter; and the total number of round turn transactions in security futures that occurred by or through any member of the association otherwise than on a national securities exchange, had a charge date in the month of the report, and are subject to assessments pursuant to section 31(d) of the Act and § 240.31 of this chapter.
17 C.F.R. §249.11
For FEDERAL REGISTER citations affecting Form R31, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.govinfo.gov.