Three commercial trucking companies along "with their national trade association and a putative class of commercial truckers (“plaintiffs”) sue the New York State Thruway Authority (the “Thruway Authority”) under 42 U.S.C. § 1983, alleging that the Thi'uway Authority charges excessive tolls in violation of the Commerce Clause of the United States Constitution. In particular, plaintiffs allege that the Thruway Authority diverts excessive highway tolls to fund maintenance and improvements to the New York Canal System (the “Canal System”)—projects that are unrelated to maintaining the Thruway as a channel of interstate commerce. The district court (McMahon, J.) dismissed under Federal Rule of Civil Procedure 12(b)(7) for failure to join the State of New York as a necessary party under Rule 19. We conclude that the ruling was an abuse- of discretion, and therefore vacate the judgment and remand for further proceedings consistent with this opinion.
BACKGROUND
The district court dismissed under Federal Rule of Civil Procedure 12(b)(7). Accordingly, the following facts drawn from plaintiffs’ complaint are presumed true, and are presented in the light most favorable to plaintiffs. See, e.g., Clarendon, Ltd. v. Bank of Saurashtra, 77 F.3d 631, 633 (2d Cir.1996). Most facts are undisputed.
The Governor Thomas E. Dewey Thruway system (the “Thruway”) is New York’s piece of the National Interstate Highway System; stretching 570 miles across the State of New York, it includes portions of 1-87, 1-90, 1-95, 1-190, and I-287. As a major artery of interstate commerce in the Northeast, it is a critical route for commercial truckers serving the region.
The Thruway is operated and managed by the New York State Thruway Authority, an “autonomous public-benefit corporation” created by a statutory charter from the State of New York. Compl. ¶ 17. Its statutory mandate is “to finance, construct, reconstruct, improve, develop, maintain, or operate” the Thruway. N.Y. Pub. Auth. Law § 353. Its organic statute authorizes the Thruway Authority to “sue and be sued,” to “make contracts,” and to “borrow money and issue negotiable notes.” Id. § 354(1), (7), (12).
The Thruway Authority is not an “arm of the state” and therefore does not enjoy New York’s Eleventh Amendment state sovereign immunity. Mancuso v. N.Y. State Thruway Auth., 86 F.3d 289, *355296 (2d Cir.1996) (“We are unable to conclude that subjecting the Thruway Authority to suit in federal court would be an affront to the dignity of New York.”). As we explained in Mancuso,
[t]he Thruway Authority ... is not a traditional state agency, but a public entity that is generally self-funded and, except for the appointment of its members to nine-year terms, it is not under significant state control. Although the Thruway Authority may be identified closely with the state, New York State has given the Thruway Authority an existence quite independent from the state and exercises the most minimal control over the Thruway Authority.
Id. at 296.
“No provision of New York law requires the state to fund the Thruway Authority’s operations,” id. at 295, the state is not liable for its debts, id. at 296; and it receives no state tax dollars and only de minimis federal funds. Instead, the Thruway Authority relies almost entirely on tolls. It is a “strictly ... user-supported system,” Compl. ¶ 47, that is “structured ... to be self-sustaining.” Mancuso, 86 F.3d at 296 (internal quotation marks omitted).
With the ascendancy of the Thruway and other modern channels of interstate commerce, the New York Canal System has faded into obsolescence. The Canal System — “a network of waterways that stretches across upstate New York,” including the Erie, Oswego, Champlain, Cayuga, and Seneca Canals — “[o]nce a vital link between the markets of the East Coast and suppliers in the Midwest, ... is now primarily a recreational space for tourists.” Compl. ¶ 2.
Since the completion of the Erie Canal in the early 1800s, the New York constitution has included explicit textual protections for the Canal System, and entrusted its management and care to the State. The wording has shifted over the years, but there has always been a constitutional commitment by the State of New York to care for the Canal System. The current provision is as follows:
The legislature shall not sell, abandon or otherwise dispose of the now existing or future improved barge canal, the divisions of which are the Erie canal, the Oswego canal, the Champlain canal, and the Cayuga and Seneca canals, or of the terminals constructed as part of the barge canal system; ... such canals and terminals shall remain the property of the state and under its management and control forever.
N.Y. Const. art. XV, § 1.
The New York constitution also obligates the legislature to support the canals financially, to some degree: “The legislature shall annually make provision for the expenses of the superintendence and repairs of the canals, and may provide for the improvement of the canals in such manner as shall be provided by law.” Id. § 3.
Historically, the Canal System was supported through the normal appropriations process and was managed by the New York Department of Transportation. In 1992, the legislature transferred responsibility for management of the Canal System from the New York Department of Transportation to the Thruway Authority. See N.Y. Canal Law § 5. The 1992 legislation created a subsidiary corporation of the Thruway Authority, called the New York Canal Corporation (the “Canal Corporation”), “which shall be deemed to be the state for the purposes of such management and control of the canals but for no other purposes,” Id. § 6(1). Finally, to respect the constitutional mandate that the State own and operate the canal system “forever,” the 1992 legislation confirmed that the “canal system shall remain the property of *356the state and under its management and control as exercised by and through” the Thruway Authority and the Canal Corporation. Id.
Now that the Canal System is operated by the Canal Corporation as a subsidiary of the Thruway Authority, the considerable cost of maintaining (and sometimes upgrading, developing, and expanding) the Canal System is funded almost entirely through the collection of highway tolls. No appropriations from New York’s general fund have been needed for many years. When the Canal System needs more funding, the Thruway Authority raises tolls. Approximately ten to twelve percent of Thruway tolls are diverted to canal-related development projects: about 80 to 100 million dollars annually.
Plaintiffs, who pay tolls on the Thruway daily, filed this lawsuit in November 2010. Primarily, plaintiffs allege that the Thruway Authority is unduly burdening interstate commerce by collecting excessive tolls to fund canal-related development projects upstate, rather than to maintain the Thruway as a channel of interstate commerce.
Plaintiffs did not name the State of New York as a defendant, and the State has not sought to intervene. The Thruway Authority—through its counsel, the Attorney General for the State of New York— moved to dismiss under Federal Rule of Civil Procedure 12(b)(7) for failure to join a necessary party under Rule 19. (Because of the Eleventh Amendment, the State cannot be joined without its consent.)
The district court granted the motion and dismissed without prejudice. First, the court noted its disagreement with our precedent in Maneuso, which forecloses Eleventh Amendment sovereign immunity for the Thruway Authority. See Am. Trucking Ass’ns, Inc. v. N.Y. State Thruway Auth., No. 13 Civ. 8123, 2014 WL 4229982, at *5 (S.D.N.Y. Aug. 6, 2014) (“Were I writing on a blank slate, I would conclude that the Thruway Authority was in fact cloaked with sovereign immunity ... [a]nd I would dismiss this lawsuit on that ground.’’). Then, after acknowledging that Maneuso is the law of this Circuit, the district court turned to Rule 19 to “recognize constitutional reality in a different way,” by holding that the State was both a necessary and an indispensable party. American Trucking, 2014 WL 4229982, at *6.
Plaintiffs appeal.
DISCUSSION
This Court reviews dismissal of a complaint under Rule 12(b)(7)—that is, “for failure to join a party under Rule 19”—only for abuse of discretion. Johnson v. Smithsonian Inst., 189 F.3d 180, 188 (2d Cir.1999). Questions of law that inform a district court’s Rule 19 determination are reviewed de novo. Seneca Nation of Indians v. New York, 383 F.3d 45, 47 (2d Cir.2004) (per curiam). An exercise of discretion that rests on an error of law is necessarily an abuse of discretion. Cooter & Gell v. Hartmarx Corp., 496 U.S. 384, 405, 110 S.Ct. 2447, 110 L.Ed.2d 359 (1990).
I
“In determining whether an action should be dismissed for nonjoinder, the court ... must initially determine whether the party should be joined as a ‘necessary party’ under Rule 19(a).” ConnTech Dev. Co. v. Univ. of Conn. Educ. Props., Inc., 102 F.3d 677, 681 (2d Cir.1996). As relevant here, an absent person may be “necessary” under Rule 19(a) if “that person claims an interest relating to the subject of the action and is so situated that disposing of the action in the person’s absence may[,] ... as a practical matter[,] impair or im*357pede the person’s ability to protect the interest.” Fed.R.Civ.P. 19(a)(1)(B).1
If joinder of a “necessary” party under Rule 19(a) is not feasible, the court consults Rule 19(b), which “requires courts to consider whether, ‘in equity and good conscience,’ the party is one without whom the action between the remaining parties cannot proceed—or, in the traditional terminology, whether the absent party is ‘indispensable.’ ” Marvel Characters, Inc. v. Kirby, 726 F.3d 119, 132 (2d Cir.2013) (quoting Fed.R.Civ.P. 19(b)): “Federal courts are extremely reluctant to grant motions to dismiss based on nonjoinder and, in general, dismissal will be ordered only when the defect cannot be cured and serious prejudice or inefficiency will result.” 7 Charles Alan Wright & Arthur R. Miller, Fed. Practice & Procedure §1609 (3d ed.2015).
II
A
The Thruway Authority argues that three distinct state “interests” are threatened if this lawsuit proceeds in the absence of the State of New York. None of them is protected by Rule 19(a).
1. New York owns the Canal System, and the New York constitution provides that the State “shall not sell, abandon or otherwise " dispose of’ it. N.Y. Const. art. XV, § 1. That prohibition lasts “forever.” Id. Relying on this language, the Thruway Authority has suggested that the State’s real property interest in the Canal System, and its corresponding obligation not to “abandon” it, are threatened by this litigation, and, thus', that this real property interest makes the State a necessary party.
To the extent this argument is still being advanced on appeal, we reject it. No judgment in this case would require New York to “sell, abandon or otherwise dispose of’ the Canal System. As context and common usage make clear, to “sell” and to “abandon” property are two ways' to “dispose of’ it. See United States v. Cowan, 396 F.2d 83, 87 (2d Cir.1968) (“The abandonment of property is the relinquishing of all title, possession, or claim to or of it—a virtual intentional throwing away of it.”). Since this lawsuit challenges only the collection of excessive Thruway tolls to fund unrelated projects, title to real property owned by an absent party is not at issue, and cannot serve as a valid interest under Rule 19(a).2
The district court focused on the State’s supposed obligation “to fund the [canal] system so as to avoid ‘abandoning’ it.” American Trucking, 2014 WL 4229982, at *5. Even ignoring that the word “abandon” is a real property term of art, and accepting the linguistic premise that insufficient funding can lead to abandonment, this lawsuit is no threat to that constitutional obligation, which the State can fulfill using its own funding sources.
2. The Thruway Authority contends that the State has a financial interest in the outcome of this litigation because, if the practice of diverting toll revenue to support the Canal System is *358held unconstitutional, the State will have to come up with another way to raise these funds. The State’s interest in having another entity fulfill its constitutional obligation to support the Canal System is assuredly significant, but it is too remote and indirect to make it a necessary party-
An adverse judgment in this case would run only against the Thruway Authority, and “the state is not legally obligated to pay for the Thruway Authority’s debts.” Mancuso, 86 F.3d at 296. True, any adverse judgment would prohibit the diversion of excess tolls to support projects that are unrelated to the Thruway’s role as a channel of interstate commerce. See generally Bridgeport & Port Jefferson Steamboat Co. v. Bridgeport Port Auth., 567 F.3d 79, 86-88 (2d Cir.2009). But that the allegedly excessive tolls are diverted to support canals is beside the point — it is the tolls that are alleged to be unconstitutional. Plaintiffs’ constitutional claims would be identical if the Thruway Authority charged excessive tolls to underwrite the State’s interest in a new baseball stadium, or agricultural research, or repertory theatre. The State may deem such expenditures essential or not, and may fund them or not; and may well prefer that the funding come from elsewhere. In the same way, if the Thruway Authority loses, the State will likely have to come up with some other way to raise money for the canals.
This theory of the State’s Rule 19 interest, premised on a lost stream of money, is inconsistent with Circuit precedent. In ConnTech Development Co. v. University of Connecticut Education Properties, Inc., 102 F.3d 677 (2d Cir.1996), we considered a Rule 19 interest asserted on behalf of the State of Connecticut, by a corporate entity (named “UCEPI”) that was “incorporated by the Connecticut legislature for the purpose of overseeing the construction” of a state-owned park on the campus of the University of Connecticut. Id. at 679. The relevant contract, however, confirmed that UCEPI was legally distinct from the State, and that the State was not liable for UCEPI’s debts. Id. at 682-83. When UCEPI was sued for breach of contract by a construction sub-contractor, it moved to dismiss for failure to join a necessary party who could not be joined: the State of Connecticut, which owned the property, funded the construction project, and had “created [UCEPI] solely to develop this project.” Id. at 682 n. 2. This Court rejected UCEPI’s Rule 19 argument:
This narrow dispute simply does not implicate any of the more general interests that Connecticut arguably could claim in the development of the property and as lessor of the property itself. Connecticut’s interests are separate and distinct from UCEPI’s contractual obligations to ConnTech.... The express language of [ ] the lease ... clearly demonstrates that Connecticut, ConnTech, and UCEPI all intended to keep Connecticut at arm’s length from the activities contemplated by the [contract].
Id. at 682-83. Because it had kept the state-owned corporation “at arm’s length,” id. — in that case, by contract — any indirect interest of Connecticut in the outcome of a lawsuit against UCEPI was insufficient under Rule 19.
To accomplish the goals of corporate separation and limited liability, Connecticut employed a contract; New York employs statutes and constitutional provisions. New York has disclaimed liability for the financial obligations of public-benefit corporations like the Thruway Authority. N.Y. Const. art. X, § 5. It has granted power to the Thruway Authority to “sue and be sued,” to “make contracts,” and to “borrow money” on its own. N.Y. Pub. Auth. Law § 354. And it has specified *359that the Thruway Authority is the “state” for “exercising the powers and duties” given to it by the Canal Law, but “for no other purposes.” N.Y. Canal Law § 5. “The express language” of these provisions “clearly demonstrates” that the State intended to keep itself “at arm’s length from the activities” of the Thruway Authority. ConnTech, 102 F.3d at 683.3
New York and the Thruway Authority, having reserved and retained the benefits of corporate separation for all other purposes, may not pierce their own arrangements to accommodate litigation strategy. That is so even if, as a practical matter, a defeat for the Thruway Authority may have downstream effects that cost the State money. The State’s interest here is the same as its interest in the fortunes of any other entity that contributes to a state function and thereby and to that extent obviates an expenditure that the state might otherwise make. Cf. Hess v. Port Auth. Trans-Hudson Corp., 513 U.S. 30, 50-51, 115 S.Ct. 394, 130 L.Ed.2d 245 (1994) (“A charitable organization may undertake rescue or other good work which, in its absence, we would expect the State to shoulder. But none would conclude, for example, that in times of flood or famine the American Red Cross, to the extent it works for the public, acquires the States’ Eleventh Amendment immunity.”); see also Askew v. Sheriff of Cook Cnty., Ill., 568 F.3d 632, 637 (7th Cir.2009) (“[T]he County does not become an ‘indispensable’ party [under Rule 19] just because it may need to indemnify the Sheriff in the future-”). New York’s financial interest in the outcome of this lawsuit—however large—is too remote and indirect to qualify as a valid Rule 19 interest.
3. The Thruway Authority contends that New York’s “interestf ] in defending the validity of its own laws,” Appellee Br. at 36, is an interest that makes the State a necessary party under Rule 19. No precedent supports that view. State (and federal) statutes are frequently challenged as unconstitutional without the state (or federal) government as a named party. A federal statute contemplates such suits by providing a notice mechanism and relaxed intervention rules for an absent sovereign in cases challenging the validity of its laws. See 28 U.S.C. § 2403(b) (in any federal suit “to which a State or any agency, officer, or employee thereof is not a party, wherein the constitutionality of any statute of that State affecting the public interest is drawn in question, the court shall certify such fact to the attorney general of the State, and shall permit the State to intervene ... for argument on the question of constitutionality”); see also id. § 2403(a) (analogous provision for the federal government). If, as the Thruway Authority argues, a state is a necessary party in any lawsuit in which a state statute is challenged as unconstitutional, there would be no need for these procedures.
*360B
Even assuming that New York had a relevant “interest” protécted by Rule 19(a), the State is only a necessary party if proceeding in its absence might, “as a practical matter[,] impair or impede” New York’s “ability to protect [its] interest.” Fed.R.Civ.P. 19(a)(l)(B)(i). As the text of the rule suggests, “[p]ragmatic considerations are controlling” in conducting this inquiry. See 7 Charles Alan Wright & Arthur R. Miller, Federal Practice & Procedure § 1601 (3d ed.2015).
In briefing and oral argument, the Thruway Authority warns of the grave prejudice to be suffered by the State of New York if this case is litigated in its absence. That argument is advanced by counsel for the Thruway Authority, Eric T. Sehneider-man, the Attorney General of the State of New York. So the careful reader will notice that the Thruway Authority’s attorney is the chief legal officer of the State of New York, and the head of New York’s Department of Law. In this role, he “serves as the guardian of the legal rights of the citizens of New York, its organizations and its natural' resources.” Our Office, Attorney General Eric T. Schneider-man, http://www.ag.ny.gov/our-office (last visited August 3, 2015).
Whatever interest New York has in the outcome of this lawsuit, we are confident that Mr. Schneiderman will keep it in mind. As we recognized in a recent Rule 19 decision, “prejudice to absent parties approaches the vanishing point when the remaining parties are represented by the same counsel, and when the absent and remaining parties’ interests are aligned in all respects.” Marvel, 726 F.3d at 134; see also United Transp. Union v. Long Island R. Co., 634 F.2d 19, 22 (2d Cir.1980) (“[I]n light of the fact that the MTA and LIRR ... took the same position as the Attorney General would have taken, he cannot be heard to claim that the disposition of the action in his absence'impairs his ability to protect the State’s interests.”), rev’d in part on other grounds, 455 U.S. 678, 102 S.Ct. 1349, 71 L.Ed.2d 547 (1982). The Thruway Authority does not dispute that its interests are “aligned in all respects,” Marvel, 726 F.3d at 134, with those of the State. Nor could it — were there adversity between the Thruway Authority and the State, Attorney General Schneiderman would surely be conflicted out of his representation of the Thruway Authority. See N.Y. Rule of Prof'l Conduct 1.7.
The absence of prejudice to the State can be demonstrated by a hypothetical. If plaintiffs had named the State as an additional defendant, and filed in state court to avoid an Eleventh Amendment problem, the substantive Commerce Clause question would be briefed identically and by the same counsel. The only likely difference would be that New York might include a separate defense that, because it is a legally distinct entity from the Thruway Authority and is not liable for the Thruway’s obligations, the State should be dismissed as a defendant.
It follows that, if this case cannot be litigated without New York, it will proceed anyway — in state court. But Rule 19 is about protecting absent persons from unfair prejudice — it is not about giving a named defendant veto power over the plaintiffs chosen forum. Cf. A.L. Smith Iron Co. v. Dickson, 141 F.2d 3, 6 (2d Cir.1944) (L. Hand, J.) (rejecting defendant’s argument that plaintiffs failed to join a necessary party, reasoning that “the [absent party] can avoid ... prejudice by intervening in this action,” and “[t]hat being true, [his] only interest in the dismissal of the complaint is ... in the choice of the forum in which ... he will assert his rights”).
Because, “as a practical matter,” any interest New York might have in this liti*361gation will be neither “impair[ed]” nor “impede[d]” by New York’s absence, the State is not a necessary party under Rule 19(a).
HI
Having concluded that the State of New York is not a necessary party under Rule 19(a), we need not consider whether the State was also an indispensable party under Rule 19(b), nor whether plaintiffs forfeited any separate Rule 19(b) argument by failing to raise it in their opening brief.
CONCLUSION
For the foregoing reasons, we vacate the judgment of the district court and remand for further proceedings consistent with this opinion.
. An absent person may also be “necessary” under Rule 19(a) if "the court cannot accord complete relief among existing parties” without the absent person, or if a person's absence subjects an existing party to a "substantial risk of incurring double, multiple, or otherwise inconsistent obligations.” Fed.R.Civ.P. 19(a)(1). None of those provisions of Rule 19(a) is at issue in this case.
. That distinguishes one of the authorities heavily relied upon by the Thruway, Seneca Nation of Indians v. New York, which stands for the unsurprising proposition that an absent sovereign may be a necessary party to a lawsuit that calls into question a real property interest of the sovereign. 383 F.3d 45 (2d Cir.2004) (per curiam).
. The concurring opinion takes issue with our discussion of ConnTech. Judge Newman perceives a distinction based on the relevant contract in ConnTech, which "expressly disavowed” any direct financial responsibility for Connecticut, see 102 F.3d at 683 n. 3, “whereas an adverse judgment in our case would create a serious financial risk for New York.” Op. of Judge Newman at 6. The distinction is not as strong as the affinity. Just as in ConnTech, the State in this case will have no direct financial obligation stemming from the judgment, because of the corporate separateness it established. See N.Y. Const. art. X, § 5. In any event, we are not relying on stare decisis, and Judge Newman may be right that Conn-Tech’s holding, standing alone, does not necessarily “defeat[] the State's claim” to a Rule 19 interest. What matters is that New York's interests in this case are, by the State's own design, "separate and distinct,” ConnTech, 102 F.3d at 682, from those of the Thruway Authority&emdash;and that subverts the Thruway Authority's Rule 19 argument.