OPINION

If two parties enter a contract that both requires arbitration of their disputes and allows impleader of a third party, must a party that did not initiate the impleader arbitrate a dispute that arises out of the same transaction at issue in the arbitration with the impleaded third party? We hold, on the facts of this case, that this question is really a question about the scope of the arbitration clause for the arbitrator to decide. Since, instead, the district court undertook to decide that question, we vacate and remand.

BACKGROUND

This appeal concerns the interplay of three related contracts. In the first (the “Construction Contract”), entered into in June 2013, appellee Portland General Electric Company (“PGE”) hired several related contracting companies (collectively, the “Contractor”) to build an Oregon power plant. The Construction Contract allows PGE to terminate the agreement upon the Contractor’s default. A “Disputes” provision requires the parties to attempt to mediate any disputes, but if mediation fails, “each Party shall have the right to take whatever legal actions that they may choose.” A “Choice of Law; Jurisdiction” provision states that the agreement is governed by Oregon substantive law and that the parties “consent to the exclusive jurisdiction of any U.S. federal court with jurisdiction over Oregon.” The contract passingly mentions arbitration twice, but does not require it. 1

The Construction Contract requires the Contractor to obtain a performance bond. Appellants Liberty Mutual Insurance Company and Zurich American Insurance Company (collectively, the “Sureties”) issued the required bond (the “Bond”) to PGE. The Bond incorporates the Construction Contract by reference and states that “[a]ny proceeding, legal or equitable, under this Bond may be instituted in any court of competent jurisdiction in the location in which the work or part of the work is located, and in any court(s) to which the Parties to the Construction Contract have agreed will have jurisdiction over disputes thereunder.” The Bond is silent as to arbitration.

The Construction Contract also requires the Contractor to obtain a guaranty of performance from a parent company, *984 Abengoa S.A. (“Abengoa”). Abengoa issued a guaranty to PGE (the “Guaranty”), in -which both parties consented to submit any disputes “in connection with this Guaranty” to binding arbitration. Of particular relevance here, the Guaranty specifies that the arbitration is to be conducted by the International Chamber of Commerce (“ICC”) under its procedural rules and Oregon substantive law, and that “[o]nce the arbitration proceeding is commenced hereunder, either Party may implead any other person or entity (with such person or entity’s consent) in, and/or raise any claim against, any other person or entity provided such claim arises out of or in connection with an agreement with a Subcontractor or this Guaranty.”

On December 18, 2015, PGE declared the Contractor in default and terminated the Construction Contract. Abengoa filed a Request for Arbitration with the ICC on December 31, 2015, naming PGE as “respondent” and the Contractor as an “im-pleaded” party. Abengoa contended that the Contractor had not defaulted, that PGE’s termination of the Construction Contract was wrongful, and that Abengoa owed PGE nothing under the Guaranty. The Contractor sought similar relief.

On March 2, 2016, Abengoa filed a Request for Joinder in the arbitration, seeking to include the Sureties, who, under the Bond, would be liable to PGE if the Contractor had defaulted. Abengoa invoked both the impleader provision in the Guaranty and Article 7 of the ICC Rules. 2 Abengoa also sought a declaration that the Sureties owed PGE nothing under the Bond. The Sureties consented to the arbitration and sought similar relief. On March 9, 2016, the Sureties sent PGE a letter denying liability under the Bond.

Two weeks later, on March 23, 2016, PGE filed this diversity action in the District of Oregon against the Sureties, alleging breach of the Bond and bad faith. PGE sought a preliminary injunction prohibiting the Sureties from arbitrating their claims against PGE, claiming that Abengoa had improperly impleaded the Sureties. PGE also filed a Jurisdictional Objection before the ICC, arguing that “the entire arbitration is an improper and collusive effort orchestrated by Abengoa and its subsidiaries to drag into international arbitration claims that [PGE, the Sureties, and the Contractor] have agreed to litigate before the Oregon courts.”

In the district court, the Sureties opposed the motion to enjoin arbitration, arguing, inter alia, that “[b]y virtue of PGE’s selection of the ICC Rules, it has expressly agreed that the arbitrator shall decide questions of arbitrability,” and that it is up to the ICC tribunal to decide whether Abengoa validly joined the Sureties and for what purposes. The Sureties then moved to stay the litigation pending the resolution of the ICC arbitration, invoking both the mandatory stay provision of the Federal Arbitration Act (“FAA”), 9 U.S.C. § 3 , and the court’s inherent authority to manage its docket.

The district court refused to stay the litigation and granted the preliminary injunction, finding that “the parties never agreed to arbitrate this dispute.” The Sureties timely , appealed. This Court *985 granted a stay of the district court proceedings pending appeal.

DISCUSSION

PGE does not dispute the validity of the arbitration clause in the Guaranty, but rather only its scope — PGE claims that the impleader provision and its acceptance of the ICC procedural rules do not extend to the resolution of its dispute with the impleaded Sureties. We review de novo the district court’s conclusion that it, rather than an arbitrator, should decide arbitra-bility. Momot v. Mastro, 652 F.3d 982, 986 (9th Cir. 2011).

Generally, “the [FAA.] establishes that, as a matter of federal law, any doubts concerning the scope of arbitrable issues should be resolved in favor of arbitration.” Moses H. Cone Mem’l Hosp. v. Mercury Constr. Corp., 460 U.S. 1, 24-25 , 103 S.Ct. 927 , 74 L.Ed.2d 765 (1983). Certain issues, however, are presumptively reserved for the court. Howsam v. Dean Witter Reynolds, Inc., 537 U.S. 79, 83 , 123 S.Ct. 588 , 154 L.Ed.2d 491 (2002). These include “gateway” questions of arbitrability, such as “whether the parties have a valid arbitration agreement or are bound by a given arbitration clause, and whether an arbitration clause in a concededly binding contract applies to a given controversy.” Momot, 652 F.3d at 987 .

However, parties may delegate the adjudication of gateway issues to the arbitrator if they “clearly and unmistakably” agree to do so. Howsam, 537 U.S. at 83-84 , 123 S.Ct. 588 (citation omitted). We have found such delegation when the parties have incorporated by reference the rules of the American Arbitration Association (“AAA”), which state in relevant part that the “arbitrator shall have the power to rule on his or her own jurisdiction, including any objections with respect to the ... validity of the arbitration agreement.” Brennan v. Opus Bank, 796 F.3d 1125, 1130 (9th Cir. 2015) (alteration in original). Although we have not opined on whether the incorporation of the rules of the ICC into an arbitration agreement also constitutes clear and unmistakable evidence of a delegation of gateway issues to the arbitrator, two of our sister circuits have held that the answer is yes. See Shaw Grp. Inc. v. Triplefine Int’l Corp., 322 F.3d 115 , 118 (2d Cir. 2003); Apollo Comput., Inc. v. Berg, 886 F.2d 469, 473-74 (1st Cir. 1989).

Because of the similarity between the ICC Rules and those of the AAA, we now join those circuits. In relevant part, the ICC Rules provide:

ICC Rules, Article 6(3). This language makes clear that the arbitrators are vested with the authority to determine questions of arbitrability.

PGE nonetheless contends that the ICC Rules do not govern the present dispute because the Bond lacks an arbitration clause. Because PGE and the Sureties never expressly agreed between themselves to delegate issues of arbitrability to the tribunal, PGE argues, a court must decide whether its dispute with the Sureties is subject to ICC arbitration.

We disagree. Whether Abengoa properly joined the Sureties to the arbitration pursuant to the Guaranty and the ICC Rules, whether the Sureties’ claim against *986 PGE meets the Guaranty’s test of “aris[ing] out of or in connection with an agreement with a Subcontractor or [the] Guaranty,” 3 and whether PGE has therefore agreed to arbitrate its dispute against the Sureties, are questions of the scope of the arbitration agreement in the Guaranty, delegated to the arbitrators.

The district court thus erred in enjoining the Sureties from participating in the ICC arbitration and denying at least a temporary stay of the litigation under the FAA, preventing the arbitral tribunal from addressing the scope of the arbitration. If the tribunal concludes that the arbitration agreement in the Guaranty extends to PGE’s dispute with the Sureties, the litigation should be stayed under the FAA pending the outcome of the arbitration or dismissed. On the other hand, if the tribunal concludes that PGE is not required under the Guaranty to arbitrate its dispute with the Sureties, the district court can then consider whether the litigation should proceed or whether a discretionary stay is appropriate pending the outcome of the arbitration. See Moses H. Cone, 460 U.S. at 20 n.23, 103 S.Ct. 927 .

CONCLUSION

For the foregoing reasons, the judgment of the district court entering a preliminary injunction prohibiting the Sureties from pursuing claims against PGE in arbitration and denying a mandatory stay of the judicial proceedings under § 3 of the FAA is VACATED and the matter is REMANDED for further proceedings consistent with this opinion. The Sureties’ appeal from the order denying their motion for a discretionary stay is DISMISSED for lack of appellate jurisdiction. See Reid v. Doe Run Res. Corp., 701 F.3d 840, 844-45 (8th Cir. 2012); Invista S.A.R.L. v. Rhodia, S.A., 625 F.3d 75, 87-88 (3d Cir. 2010). Each party shall bear its own costs on appeal.

. A "Responsibilities of Contractor” provision gives PGE the right to audit the Contractor; PGE must “treat such audit data as confidential, but shall not be precluded from using such audit data in any legal proceedings (including without limitation mediation or arbitration) arising under this Agreement.” A "Costs and Attorney Fees” provision states: "In any litigation arising out of this Agreement, including arbitration and any case or proceeding under the Bankruptcy Code or any successor statute, the prevailing Party shall be entitled to recover [reasonable expenses].”

. Article 7, , titled "Joinder of Additional Parties,” states in relevant part:

ICC Rules, Article 7(1).

. A few circuits have held, or adopted variants of the rule, that "this delegation applies only to claims that are at least arguably covered by the agreement [to arbitrate]." Turi v. Main St. Adoption Servs., LLP, 633 F.3d 496, 507, 511 (6th Cir. 2011); see Douglas v. Regions Bank, 757 F.3d 460, 464 (5th Cir. 2014); Qualcomm Inc. v. Nokia Corp., 466 F.3d 1366, 1371 (Fed. Cir. 2006). But this approach is not universally followed. See Belnap v. Iasis Healthcare, 844 F.3d 1272, 1292 (10th Cir. 2017); see also id. at 1290 (determining that "a majority of our sister circuits” reject any variant of the "arguably covered” approach). Moreover, one of our own opinions can be read to have rejected it, although it might have been in dicta by which we would not be bound. See Oracle Am., Inc. v. Myriad Grp. A.G., 724 F.3d 1069, 1076 (9th Cir. 2013).

We need not take a side in this circuit split, or determine if we already have, because the Sureties’ claim against PGE is, at least, "arguably covered” by the Guaranty's arbitration clause. See Agere Sys., Inc. v. Samsung Elecs. Co., 560 F.3d 337, 340 (5th Cir. 2009) (declining to take a side for the same reason). The liability of both the Sureties and Abengoa to PGE turns on the same issue: whether the Contractor defaulted under the Construction Contract. In addition, the Sureties and Abengoa have signed an indemnification agreement between themselves. Cf. Mundi v. Union Sec. Life Ins. Co., 555 F.3d 1042, 1046 (9th Cir. 2009) (noting that nonsignatory to arbitration agreement may compel signatory to arbitrate if the dispute is "intertwined with the contract providing for arbitration” and there is a sufficiently close "relationship among the parties” (quoting Sokol Holdings, Inc. v. BMB Munai, Inc., 542 F.3d 354, 359-61 (2d Cir. 2008))). It is at least arguable that the Sureties’ claim against PGE "arises out of or in connection with an agreement with a Subcontractor or [the] Guaranty,” and regardless of which side of the circuit split the Ninth Circuit falls, it is therefore up to the ICC to decide whether the Sureties’ claim falls within the scope of the arbitration clause in the first instance.