Opinion for the court filed by Circuit Judge HENDERSON.
Melanie Lubin, the Maryland Securities Commissioner (Commissioner), appeals the district court’s denial of her motion to intervene as of right in an arbitration confirmation proceeding. See Karsner v. Lothian, No. 07cv334 (D.D.C. Apr. 9, 2007) (minute order). In the underlying arbitration, the panel had recommended — pursuant to a settlement agreement — that a customer complaint and the ensuing arbitration be expunged from the disciplinary record of a securities broker — dealer who was licensed in Maryland. See Pet. to Confirm Arbitration Award, Ex. 1 (Feb. 12, 2007). The Commissioner contends that the district court erred in denying intervention because she has a substantial interest in ensuring the integrity of her records. We agree and reverse and remand for the reasons set forth below.
I.
Pamela Lothian (Lothian) was a customer of Joseph R. Karsner, IV (Karsner), a securities broker-dealer registered both with the Financial Industry Regulatory Authority (FINRA) and with the State of Maryland. 1 This case arises out of a FIN-RA arbitration that settled the complaint Lothian lodged against Karsner.
A. Regulatory Background
The Securities Exchange Act of 1934, 15 U.S.C. §§ 78a
et seq.
(Exchange Act), “provides a comprehensive system of federal regulation of the securities industry.”
Austin Mun. Sec., Inc. v. Nat’l Ass’n of
*880
Sec. Dealers, Inc.,
FINRA, as NASD’s successor, is “the only officially registered ‘national securities association’ under [the Exchange Act].”
Nat’l Ass’n of Sec. Dealers, Inc. v. SEC,
FINRA requires a broker-dealer member to arbitrate a dispute with a customer if “[required by a written agreement” or “[Requested by the customer” and “[t]he dispute arises in connection with the business activities of the member.” NASD Manual § 12200. Any customer dispute resulting in arbitration is included in the member’s Central Registration Depository (CRD) 2 record and a member “seeking to expunge information from the CRD system arising from disputes with customers must obtain an order from a court of competent jurisdiction directing such expungement or confirming an arbitration award containing expungement relief.” Id. § 2130(a). According to Rule 2130(b), a broker-dealer member of FINRA “petitioning a court for expungement relief or seeking judicial confirmation of an arbitration award containing expungement relief must name [FINRA] as an additional party and serve [FINRA] with all appropriate documents.” Id. § 2130(b).
A broker-dealer doing business in Maryland must also register with the Maryland Securities Division. See Md.Code Ann., Corps. & Ass’ns § 11-401 (2007 Repl.Vol.). To register, the broker-dealer must agree *881 to, inter alia, the inclusion of relevant information (such as customer complaints and arbitrations) in the CRD. Id. § 11-405; Md.Code Regs. 02.02.02.01. The North American Securities Administrators Association, Inc. (NASAA) maintains and administers the CRD database pursuant to an agreement with FINRA. See CRD Agreement Amendment, ¶ 3(e) (Dec. 13, 1996).
B. Karsner
Karsner, a mutual fund broker-dealer registered with FINRA and the Maryland Securities Division, was employed by Legacy Financial Services, Inc. (Legacy) in Gambrills, Maryland. 3 On October 19, 2004, Pamela Lothian, one of Karsner’s mutual fund customers, began a FINRA arbitration proceeding against Karsner and Legacy by complaining that Karsner had induced her to invest in unsuitable investments and had negligently managed her account resulting in losses of approximately $104,638. Before the arbitration hearing, Lothian settled her claims against Karsner and Legacy. Pursuant to the settlement agreement, Lothian received $47,000 in exchange for abandoning her claims and stipulating to the expungement of all references to the dispute from Kars-ner’s CRD record. On February 14, 2006, the arbitration panel approved the stipulated award, dismissed with prejudice Lot-hian’s claims against Karsner and Legacy and “recommend[ed] the expungement of all reference to the ... arbitration from Respondent Karsner’s registration record maintained by the NASD Central Registration Depository.” Pet. to Confirm Arbitration Award, Ex. 1.
Karsner filed a petition to confirm the Stipulated Award in the district court on February 12, 2007, naming Lothian and NASD as respondents. Id. ¶ 14. NASD notified NASAA of the filing and NASAA in turn notified Commissioner Lubin. On March 20, 2007, the Commissioner moved to intervene pursuant to Federal Rule of Civil Procedure 24(a)(2) in order to oppose the expungement of Karsner’s CRD record. 4 The district court denied the motion to intervene by minute order on April 9, 2007. Two days later, the district court granted Karsner’s petition to confirm the Stipulated Award. Karsner v. Lothian, No. 07cv334 (D.D.C. Apr. 11, 2007).
The Commissioner then filed a motion to reconsider the district court’s denial of intervention, which was denied by minute order on April 27, 2007.
Karsner v. Lothian,
No. 07cv334,
II.
Before addressing the merits, we must resolve the threshold issues of the district court’s subject matter jurisdiction and mootness.
A. Subject Matter Jurisdiction
The Commissioner argues that the district court lacked subject matter jurisdiction over Karsner’s petition and that the Court should therefore vacate the district court’s order. Appellant’s Br. 13.
Although the Federal Arbitration Act (FAA) constitutes federal law, “the Supreme Court has interpreted the statute as not itself bestowing jurisdiction on the federal district courts.”
Kasap v. Folger Nolan Fleming & Douglas, Inc.,
Other circuits have used three different approaches to this question: the award, the demand and the remand approaches. Under the award approach, the amount in controversy is determined by the amount of the underlying arbitration award regardless of the amount sought.
See, e.g., Ford v. Hamilton Invs., Inc.,
Of the three approaches, the award approach has the least appeal. The Sixth and Eleventh Circuits have followed the award approach,
see Ford,
In contrast, the demand approach has merit and has recently been applied by two other circuit courts. For example, the Ninth Circuit recently upheld the exercise of diversity jurisdiction over a petition to vacate an arbitration award of $0.
Theis Research, Inc. v. Brown & Bain,
While maintaining that the district court has jurisdiction over his petition, Karsner argues that the Commissioner must assert an independent ground of subject matter jurisdiction to intervene. We observed in
EEOC v. National Children’s Center, Inc.,
B. Mootness
Before briefing the merits, Kars-ner moved to dismiss the Commissioner’s appeal as moot because the Commissioner did not appeal the district court’s confirmation order. He maintains that even if the Court reverses the district court’s denial of the Commissioner’s motion to intervene, “the ultimate relief sought by Appellant — vacatur of that portion of the Arbitration Award that called for ex-pungement of Lothian’s claim against Karsner from the CRD — can no longer be granted” because the Commissioner failed to appeal the confirmation order. Appel-lee’s Br. 32.
*885
While it would have been prudent for the Commissioner to have appealed the confirmation order,
see, e.g., Alternative Research & Dev. Found. v. Veneman,
C. Intervention
Intervention as of right obtains if the party seeking intervention “claims an interest relating to the property or transaction that is the subject of the action, and is so situated that disposing of the action may as a practical matter impair or impede the movant’s ability to protect its interest, unless existing parties adequately represent that interest.” Fed.R.Civ.P. 24(a)(2). We have identified four prerequisites to intervene as of right: “(1) the application to intervene must be timely; (2) the applicant must demonstrate a legally protected interest in the action; (3) the action must threaten to impair that interest; and (4) no party to the action can be an adequate representative of the applicant’s interests.”
SEC v. Prudential Sec. Inc.,
The remaining factor, timeliness, “ ‘is to be judged in consideration of all the circumstances, especially weighing the factors of time elapsed since the inception of the suit, the purpose for which intervention is sought, the need for intervention as a means of preserving the applicant’s rights, and the probability of prejudice to those already parties in the case.’ ”
United States v. British Am. Tobacco Austl. Servs., Ltd.,
Moreover, the Commissioner asserts that if remand is ordered, she will move under Rule 60(b)(4) to void the district court’s confirmation order. As we have explained, however, “[r]elief under Rule 60(b)(4) is not available merely because a disposition is erroneous.”
Combs v. Nick Garin Trucking,
For the foregoing reasons, we reverse the district court’s denial of intervention as of right. Because the confirmation order has not been appealed, however, we must remand for further proceedings consistent with this opinion. If on remand the Commissioner successfully moves under Rule 60(b)(4) to void the district court’s confirmation order, the district court may not subsequently grant expungement relief without identifying a source of authority— other than section 9 of the FAA — giving it the power to do so. In this regard, NASD Rule 2130, entitled “Obtaining an Order of Expungement of Customer Dispute Information from the [CRD],” should be analyzed. As noted earlier, Rule 2130(a) requires a broker-dealer member of FINRA (like Karsner) to “obtain an order from a court of a competent jurisdiction
directing
such expungement or confirming an arbitration award
containing expungement relief.”
NASD Rule 2130(a) (emphases added). Regarding the confirmation of an arbitration award “containing expungement relief,” we do not read this language to include a mere recommendation of ex-pungement relief but rather the arbitration award must direct expungement.
13
And if, instead, the FINRA member asks the court itself to “direct” expungement, Rule 2130(b) requires that NASD (now FINRA) be named as a party unless NASD (now FINRA) waives the requirement upon certain “affirmative judicial ... findings.” NASD Rule 2130(b). Moreover, although the NASD Rules require SEC approval,
see
15 U.S.C. § 78s(b),
14
the Rules do not come within the meaning of 15 U.S.C. § 78aa which gives a federal court “exclusive jurisdiction of violations” of rules and regulations promulgated under the Securities Exchange Act of 1934, 15 U.S.C. §§ 78a
et seq. See Ford v.
*888
Hamilton Invs., Inc.,
So ordered.
Notes
. FINRA is the successor of the National Association of Securities Dealers (NASD). In July 2007, NASD and the New York Stock Exchange (N.Y.SE) consolidated their "member regulation operations” into one self-regulatory organization (FINRA). See SEC Release No. 34-56145 (July 26, 2007).
. "The CRD system serves as an electronic filing system for the securities industry and as a means of gathering, organizing, and retrieving information used by state (including Maryland) and federal securities regulators.” Appellant's Br. 5-6.
. Legacy was incorporated in California and registered as a broker-dealer in Maryland in 1996. BrokerCheck Report, Legacy Financial Services, Inc., CRD No. 38697 (generated June 24, 2008), available at http:// brokercheck.finra.org. It appears that it is no longer doing business as Legacy. See Bruce Kelly, Legacy Financial Closes Shop: Indie Broker-Dealer Sells Most Reps to Multi-Finan-cial Securities, Investment News, Sept. 3, 2007, available at 2007 WLNR 17582642.
. Rule 24(a)(2) provides in part that the court “must permit anyone to intervene who ... claims an interest relating to the property or transaction that is the subject of the action, and is so situated that disposing of the action may as a practical matter impair or impede the movant’s ability to protect its interest, unless existing parties adequately represent that interest.” Fed.R.Civ.P. 24(a)(2).
. Additionally, the award approach may discourage arbitration because it effectively punishes parties for choosing arbitration over litigation to settle a dispute. Frost, supra p. 9, at 254-55. For example, if the claimant in arbitration seeks $100,000 and is awarded only $50,000, a petition to confirm/vacate would be below the jurisdictional amount. But if the claimant had instead filed suit in federal court, jurisdiction would have existed. See 28 U.S.C. § 1332.
. In
Theis,
the Ninth Circuit noted
American Guaranty’s
declaration that " '[i]t is the amount in controversy which determines jurisdiction, not the amount of the award' " and concluded that its holding is consistent with
American Guaranty.
. We further note our own jurisdiction to review the district court’s denial of the Commissioner’s motion to intervene pursuant to 28 U.S.C. § 1291.
See Acree v. Republic of Iraq,
. Rule 60(b)(4) provides that "the court may relieve a party or its legal representative from a final judgment, order, or proceeding ... [if] the judgment is void." Fed.R.Civ.P. 60(b)(4).
. The CRD Agreement between NASAA and NASD (now FINRA) states that “[t]he data on CRD Uniform Forms filed with the CRD shall be deemed to have been filed with each CRD State in which the applicant seeks to be licensed and with [FINRA] and shall be the joint property of the applicant, [FINRA], and those CRD States.” CRD Agreement Amendment, ¶ 3(e) (Dec. 13, 1996) (emphasis added). The Commissioner is the "official custodian” of the Securities Division’s records, see Md.Code Ann., State Gov’t § 10-611 (2004 Repl. Vol and 2007 Supp.); Md.Code Ann., Corps. & Ass’ns § 11-405 (2007 Repl.Vol.), including broker-dealer registrations. See id. §§ 11-404, 11-405; Md.Code Regs. 02.02.02.01. A "public record” is defined as "any documentary material that ... is made by a unit or instrumentality of the State government ... or received by the unit or instru *886 mentality in connection with the transaction of public business,” Md.Code Ann., State Gov’t § 10-611.
. Karsner contends that the Commissioner’s motion to intervene was untimely because it was not filed within the FAA’s 90-day window to file a notice to modify or vacate an arbitration award. See 9 U.S.C. § 12 (“Notice of a motion to vacate, modify, or correct an award must be served upon the adverse party or his attorney within three months after the award is filed or delivered.”). The Commissioner, however, seeks the vacatur of the district court's confirmation order — not the arbitration award — and therefore the FAA’s 90-day deadline is irrelevant.
. See 9 U.S.C. § 9 ("If the parties in their agreement have agreed that a judgment of the court shall be entered upon the award made pursuant to the arbitration, and shall specify the court, then at any time within one year after the award is made any party to the arbitration may apply to the court so specified for an order confirming the award, and thereupon the court must grant such an order unless the award is vacated, modified, or corrected as prescribed in sections 10 and 11 of this title.”) (emphases added).
. Interestingly, Karsner himself requested only that the arbitration panel dismiss Lothi-an’s complaint and "award [him] forum fees, attorneys' fees and any other costs and fees incurred by [him] in defending this action.” Pet. to Confirm Arbitration Award, Ex. 1.
. In 1999, NASD issued a notice imposing a moratorium on arbitrator-ordered expungement of information from the CRD because, according to NASAA, "under the laws of certain states, information filed with the CRD system is deemed to have been filed with those states, and ... is therefore a state record subject to all of the regulations and protocols that apply to state records.” NASD Notice to Members 99-09, 47-48 (Feb.1999), available at http://www.finra.org/Rules Regulation/NoticestoMembers. Further, "in [NASAA's] opinion, state laws do not currently recognize the authority of an arbitrator to expunge a state record or do not otherwise currently permit such expungements due to record keeping requirements.” Id. The moratorium appears to remain in effect. See NASD Notice to Members 04-16, 213 (Mar. 2004), available at http://www.finra.org/Rules Regulation/NoticestoMembers ("Rule 2130 continues the requirement started with the January 1999 moratorium that a court of competent jurisdiction must order or confirm all expungement directives before NASD will expunge customer dispute information from the CRD system.”); cf. Pet. to Confirm Arbitration Award, Ex. 1 ("The Panel recommends the expungement of all reference to the above-captioned arbitration from Respondent Karsner’s registration record maintained by the NASD Central Registration Depository (‘CRD’), with the understanding that, pursuant to NASD Notice to Members 04-16, Respondent Karsner must obtain confirmation from a court of competent jurisdiction before the CRD [sic] will execute the expungement directive.").
.Rule 2130 was approved by the SEC in 2003. Order Granting Approval of NASD Proposed Rule Change Concerning the Ex-pungement of Customer Dispute Information From the Central Registration Depository System, 68 Fed.Reg. 74,667 (Dec. 24, 2003).
