Judge CABRANES, joined by Judge HALL, concurs in a separate opinion.
SACK, Circuit Judge:
This appeal is but the latest chapter in a lengthy dispute over the payment of state and local taxes by the plaintiff-appellee Oneida Indian Nation of New York (the “OIN”). The Supreme Court most recently addressed the OIN’s tax obligations in City of Sherrill, N.Y. v. Oneida Indian Nation of N.Y., 544 U.S. 197, 125 S.Ct. 1478, 161 L.Ed.2d 386 (2005) {“Sherrill”). The Court rejected the OIN’s contention that parcels of lands allegedly within the boundaries of an Indian reservation once occupied by the Oneidas, which were sold to non-Indians during the early 19th century and bought back by the OIN on the open market in the 1990s, thereby came under the sovereign dominion of the OIN and were therefore exempt from municipal taxation.1 The OIN nonetheless now seeks to enjoin the defendants-appellants Madison and Oneida Counties (the “Counties”) from foreclosing on this property for nonpayment of county taxes. On cross-motions for summary judgment brought in both of the cases that are consolidated on this appeal, the district court ruled in favor of the OIN. See Oneida Indian Nation v. Oneida County, 432 F.Supp.2d 285, 292 (N.D.N.Y.2006) (“Oneida County ”); Oneida Indian Nation of N.Y. v. Madison County, 401 F.Supp.2d 219, 232-33 (N.D.N.Y.2005) (“Madison County”). We affirm on the ground that the OIN is immune from suit under the long-standing doctrine of tribal sovereign immunity. The remedy of foreclosure is therefore not available to the Counties.
The Stockbridge-Munsee Community, [152]*152Band of Mohican Indians (“Stoekbridge”)2 filed a motion to intervene in Oneida County pursuant to Federal Rule of Civil Procedure 24(a), with the goal of obtaining dismissal of that action to the extent that the land at issue was found to overlap with Stockbridge’s purported six-square-mile reservation. The district court rejected Stockbridge’s motion, finding that Stock-bridge could not demonstrate an interest in the Oneida County litigation. See 432 F.Supp.2d at 291-92. We conclude that this was not an abuse of discretion.
BACKGROUND
The history of the land at issue here and transactions affecting it has been set forth at some length in several other opinions of this and other courts. See, e.g., Sheirill, 544 U.S. at 203-12, 125 S.Ct. 1478; Oneida Indian Nation of N.Y. v. City of Sherrill, N.Y., 337 F.3d 139, 146-52 (2d Cir.2003) (“Oneida Indian Nation of N.Y.”), rev’d, Sherrill, 544 U.S. 197, 125 S.Ct. 1478, 161 L.Ed.2d 386; Oneida Indian Nation of N.Y. v. City of Sherrill, N.Y., 145 F.Supp.2d 226, 232-36 (N.D.N.Y.2001), aff'd in part, vacated and remanded in part, Oneida Indian Nation of N.Y., 337 F.3d 139, rev’d, Sherrill, 544 U.S. 197, 125 S.Ct. 1478, 161 L.Ed.2d 386. We recite only those facts that we think are necessary for an understanding of our resolution of this appeal.
The OIN’s Land
The OIN is a federally recognized Indian Tribe that is directly descended from the Oneida Indian Nation (“Oneida Nation”).3 The Oneida Nation’s lands once encompassed some six million acres in what is now central New York State. In 1788, pursuant to the Treaty of Fort Schuyler between the Oneida Nation and the State of New York, the Nation ceded title to nearly all of its land to the State, retaining a reservation of only approximately 300,000 acres. Sherrill, 544 U.S. at 203, 125 S.Ct. 1478.
In 1790, Congress passed the first Indian Trade and Intercourse Act. See Act of July 22, 1790, ch. 33, 1 Stat. 137 (“Nonintercourse Act”). The Nonintercourse Act, which remains substantially in force today, bars the sale of tribal land without federal government acquiescence. Sherrill, 544 U.S. at 204, 125 S.Ct. 1478. In spite of the provisions of the Act, towards the end of the 18th century and at the beginning of the 19th century, the Oneida Nation sold substantial portions of the remaining reservation land to New York State and to private parties without the federal supervision that the Act required. See id. at 205-06, 125 S.Ct. 1478; Oneida Indian Nation of N.Y., 337 F.3d at 147-48. See also United States v. Oneida Nation of N.Y., 201 Ct.Cl. 546, 477 F.2d 939, 940 (1973) (concluding that the federal government owed a fiduciary duty to protect members of the Oneida Nation in connection with their land dealings with New York State between 1795 and 1846). That land was subsequently sold to non-Indians in free-market transactions. See Oneida Indian Nation of N.Y. v. City of Sherrill, N.Y., 145 F.Supp.2d at 234 n. 3. By 1838, the [153]*153Oneida Nation had sold all but 5,000 acres of the reservation that had been created by the Treaty of Fort Schuyler. See Sherrill, 544 U.S. at 206, 125 S.Ct. 1478. By 1920, that number had dwindled to thirty-two acres. Id. at 207, 125 S.Ct. 1478.
Beginning in 1970, descendants of members of the Oneida Nation pursued federal litigation against local governments in New York in an effort to assert that certain of New York State’s purchases of reservation land during the late 18th and early 19th centuries had been in violation of the Nonintercourse Act, and therefore had not terminated the Oneidas’ right to possess the land. See id. at 208-11, 125 S.Ct. 1478 (summarizing cases). In the 1990s, OIN tribe members also began to purchase, through open-market transactions, land that had once been a part of the Oneida Nation’s reservation. See Oneida Indian Nation of N.Y., 337 F.3d at 144.
The Supreme Court’s Decision in Sherrill
At issue in SHERRILL were parcels of land in the city of Sherrill (located in Oneida County, New York) that had originally been part of the Oneida Nation reservation as established by the Treaty of Fort Schuyler, but that had been transferred by the Oneida Nation to one of its members in 1805, and then in 1807 sold by that person to a non-Indian. Sherrill, 544 U.S. at 211, 125 S.Ct. 1478. The OIN re-acquired these parcels on the open market in 1997 and 1998. Id. In SHERRILL, the OIN asserted that these properties were exempt from taxation, arguing
that because the Court in [Oneida County, N.Y. v. Oneida Indian Nation of N.Y., 470 U.S. 226, 105 S.Ct. 1245, 84 L.Ed.2d 169 (1985)4] recognized the Oneidas’ aboriginal title to their ancient reservation land and because the Tribe has now acquired the specific parcels involved in this suit in the open market, it has unified fee and aboriginal title and may now assert sovereign dominion over the parcels.
Id. at 213, 125 S.Ct. 1478. Based on that contention, the OIN had brought suit in the United States District Court for the Northern District of New York seeking injunctive and declaratory relief that would require recognition of its present and future sovereign immunity from local taxation on the land. Id. at 214, 125 S.Ct. 1478. We agreed on the basis that “land in Indian country ... is not subject to state taxation absent express congressional authorization.” Oneida Indian Nation of N.Y., 337 F.3d at 154 (citing, inter alia, Worcester v. State of Ga., 31 U.S. 515, 557, 6 Pet. 515, 8 L.Ed. 483 (1832), White Mountain Apache Tribe v. Bracker, 448 U.S. 136, 151, 100 S.Ct. 2578, 65 L.Ed.2d 665 (1980), and Montana v. Blackfeet Tribe of Indians, 471 U.S. 759, 765, 105 S.Ct. 2399, 85 L.Ed.2d 753 (1985)).
The Supreme Court reversed. It “rejected] the unification theory of OIN and the United States and h[e]ld that ‘standards of federal Indian law and federal equity practice’ preclude[d] the Tribe from rekindling embers of sovereignty that long ago grew cold.” Sherrill, 544 U.S. at 214, 125 S.Ct. 1478. Noting that “justifiable expectations, grounded in two centuries of New York’s exercise of regulatory jurisdiction, until recently uncontested by OIN, merit heavy weight,” id. at 215-16, 125 S.Ct. 1478, the Court concluded:
[154]*154[T]he distance from 1805 to the present day, the Oneidas’ long delay in seeking equitable relief against New York or its local units, and developments in the city of Sherrill spanning several generations, evoke the doctrines of laches, acquiescence, and impossibility, and render inequitable the piecemeal shift in governance this suit seeks unilaterally to initiate.
Id. at 221, 125 S.Ct. 1478.
Madison County’s Actions
Madison County has regularly assessed taxes with respect to the parcels of land in the county that were purchased by the OIN in the 1990s that are claimed to lie within the boundaries of the reservation described in the Treaty of Fort Schuyler. See Madison County, 401 F.Supp.2d at 223. Each year in which the OIN failed to pay property taxes, Madison County would initiate foreclosure proceedings against the OIN-owned parcels as part of its yearly foreclosure actions in state court. Madison County would then abandon the foreclosure proceedings against the OIN-owned parcels, in anticipation of a resolution of the taxability question in Sherrill, when it became clear that the Sherrill litigation would continue for another year. Id. Madison County initiated and then abandoned foreclosure proceedings in this manner in each year until 2003, id., when this Court effectively separated the ongoing Madison County litigation from the Sherrill litigation and remanded it to the district court for further proceedings, see Oneida Indian Nation of N.Y., 337 F.3d at 171.
On November 14, 2003, the county instituted a foreclosure action with respect to such OIN-owned property in New York State court. Madison County, 401 F.Supp.2d at 223. This time, however, the county did not abandon these foreclosure proceedings as it has done in previous years. A Petition and Notice of Foreclosure was mailed to the owners of property that the county was seeking foreclosure upon for non-payment of taxes, including the OIN, on December 8, 2004, and was published in December 2004 and January 2005. Id. It specified March 31, 2005, as the last day for redemption of these properties.5 Id. The Supreme Court decided Sherrill on March 29, 2005, just two days before this final day of redemption. Id. On April 28, 2005, Madison County moved for summary judgment in the 2003 state court foreclosure action. Id. In the instant federal proceedings, however, which had been pending in the district court following this Court’s remand in 2003, the district court issued a preliminary injunction enjoining the state foreclosure proceedings. See id.; Oneida Indian Nation of N.Y. v. Madison County, 376 F.Supp.2d 280, 283 (N.D.N.Y.2005).
Oneida County’s Actions
Oneida County follows a property tax foreclosure procedure that is different from Madison County’s. Pursuant to county law, the county arranges for and advertises a tax auction for the sale of any property on which taxes, which are uniformly due on January 31, are delinquent [155]*155by six months or more. See Oneida County, 432 F.Supp.2d at 287. The tax sale is held on the last business day of December. Id. The delinquent taxpayer then has three years to redeem the property, and an additional thirty days following receipt of a Final Notice Before Redemption. Id. at 287-88. This process was adhered to with respect to all 280 OIN-owned parcels located within both Oneida County and, allegedly, the reservation boundaries established by the Treaty of Fort Schuyler. During the summer and early autumn of 2005, Final Notices Before Redemption were delivered to the OIN regarding 187 of those parcels. Id. at 288. On October 28, 2005, the OIN sought and received a restraining order preventing further foreclosure efforts against any of the 280 parcels, pending this outcome of this litigation. See id.
Stockbñdge
Stockbridge seeks to intervene in these proceedings based on its contention that fifty-two land parcels (two in Oneida County and fifty in Madison County) are part of an undiminished reservation of the Stock-bridge Band rather than the Oneidas. There is litigation pending addressing this claim in the Northern District of New York. See Stockbridge-Munsee v. State of New York, No. 3:86-CV-1140 (N.D.N.Y. Oct. 15, 1986). Stockbridge argues that the Treaty of Fort Schuyler set aside a six-square-mile permanent reservation for the Stockbridge Band, separate from a surrounding 250,000 acre tract reserved for the Oneidas.
District Court Proceedings
In both of the cases consolidated on appeal, the district court concluded that the remedy of foreclosure was not available to the Counties on four independent grounds: 1) the Nonintercourse Act renders the OIN’s properties inalienable and therefore not subject to foreclosure, see Madison County, 401 F.Supp.2d at 227; Oneida County, 432 F.Supp.2d at 289; 2) tribal sovereign immunity bars suit against the OIN, see Madison County, 401 F.Supp.2d at 228-29; Oneida County, 432 F.Supp.2d at 289; 3) the Due Process Clause of the Fifth Amendment was violated by the Counties’ failure to give the OIN adequate notice of the expiration of the redemption period, see Madison County, 401 F.Supp.2d at 230; Oneida County, 432 F.Supp.2d at 289-90; and 4) the land in question is exempt from taxation under New York State law, see Madison County, 401 F.Supp.2d at 231; Oneida County, 432 F.Supp.2d at 290.
The district court denied Stockbridge’s motion to intervene in Oneida County on the ground that Stockbridge could not demonstrate sufficient interest in the litigation. See 432 F.Supp.2d at 291-92.
The Counties appeal from the grant of summary judgment against them. Stock-bridge appeals from the district court’s denial of its motion to intervene. The State of New York appears as amicus curiae in support of the Counties, urging us to reverse the decision of the district court. Upon order of this Court, the United States also submitted a brief as amicus curiae. In that brief, the United States urges us to affirm on the ground that the OIN’s tribal sovereign immunity bars the Counties’ efforts to foreclose on OIN-owned land.
Since this Court heard oral argument in this matter, there have been several developments that affect the practical implications of this Court’s decision on Madison and Oneida Counties. While these developments do not render moot any of the issues before this Court on appeal, we think it useful to describe them briefly.
In a Record of Decision issued on May 20, 2008, in response to the OIN’s applica[156]*156tion, the Department of the Interior determined that it would take 13,003.89 acres of the OIN-owned land at issue in this appeal into trust, pursuant to 25 U.S.C. § 465 and 25 C.F.R. Part 151. See Department of the Interior, Record of Decision, May 20, 2008 (“Record of Decision”). Notice of this decision was published in the Federal Register on May 23, 2008. 73 Fed.Reg. 30144. This land will no longer be subject to state or local taxation. 25 U.S.C. § 465. As a result, only approximately 4,000 of the 17,000 acres of property originally at issue in this case will remain subject to state and local taxation in the future.
In connection with the land trust, in order to satisfy the trust regulations, the OIN has posted letters of credit securing the payment of all taxes, penalties, and interest determined by the courts to be due on the land at issue and has agreed to supplement or replace those letters to secure payment of any additional penalties and interest that may accrue while litigation concerning the trust decision is pending. Record of Decision at 53. These letters cover substantially all taxes, penalties, and interest assessed on all of the OIN-owned property at issue in this case, including those parcels that the Department of the Interior has decided not to take into trust. Accordingly, notwithstanding this Court’s decision on this appeal, it appears that the Counties will receive back payment of all taxes, penalties, and interest due on the property at issue in this lawsuit. Despite this development and the practical implications it has for the parties in this case, we reiterate that it does not render moot any of the issues raised on nor affect our consideration of this appeal.
DISCUSSION
I. Standard of Review
“We review a district court’s grant of summary judgment de novo, construing the evidence in the light most favorable to the non-moving party and drawing all reasonable inferences in its favor.” Allianz Ins. Co. v. Lerner, 416 F.3d 109, 113 (2d Cir.2005). “[Sjummary judgment is appropriate where there exists no genuine issue of material fact and, based on the undisputed facts, the moving party is entitled to judgment as a matter of law.” D’Amico v. City of N.Y., 132 F.3d 145, 149 (2d Cir.1998); see also Fed. R. Civ. Pro. 56(c).
II. Tribal Sovereign Immunity
A. The Distinction Between Sovereign Authority Over Reservation Lands And Sovereign Immunity From Suit
The Counties assert that the Supreme Court’s decision in Shemll requires reversal here because the Sherrill Court ruled that the land in question is not sovereign tribal land, and it is therefore subject to taxation. The Counties interpret Sherrill to hold that the OIN cannot assert sovereign immunity to prevent a foreclosure action on such land.
We think that this argument improperly conflates two distinct doctrines: tribal sovereign authority over reservation lands and tribal sovereign immunity from suit. The freedom from state taxation, in the broader context of immunity from state regulation, which is addressed in Sherrill, arises from a tribe’s sovereign authority over its reservation lands. This sovereign authority was examined by the Supreme Court as early as 1832:
From the commencement of our government, congress has passed acts to regulate trade and intercourse with the Indians; which treat them as nations, respect their rights, and manifest a firm purpose to afford that protection which treaties stipulate. All these acts ... [157]*157manifestly consider the several Indian nations as distinct political communities, having territorial boundaries, 'within which them authority is exclusive....
Worcester v. State of Ga., 31 U.S. 515, 556-57, 6 Pet. 515, 8 L.Ed. 483 (1832) (Marshall, C.J.), abrogated on other grounds as recognized by Nevada v. Hicks, 533 U.S. 353, 361-62, 121 S.Ct. 2304, 150 L.Ed.2d 398 (2001) (remarking that “the Indians’ right to make their own laws and be governed by them does not exclude all state regulatory authority on the reservation.”). “The conceptual clarity of Mr. Chief Justice Marshall’s view in Worcester ... has given way to more individualized treatment of particular treaties and specific federal statutes.” Mescalero Apache Tribe v. Jones, 411 U.S. 145, 148, 93 S.Ct. 1267, 36 L.Ed.2d 114 (1973).
But the Supreme Court has “eategorieal[ly]” maintained that “[a]bsent cession of jurisdiction or other federal statutes permitting it, ... a State is without power to tax reservation lands and reservation Indians.” County of Yakima v. Confederated Tribes and Bands of Yakima Indian Nation, 502 U.S. 251, 258, 112 S.Ct. 683, 116 L.Ed.2d 687 (1992) (internal quotation marks omitted). This principle has been traced in later Supreme Court decisions to Worcester and other cases of its era. See, e.g., id. at 257-58, 112 S.Ct. 683; Mescalero, 411 U.S. at 148, 93 S.Ct. 1267; Montana v. Blackfeet Tribe of Indians, 471 U.S. 759, 764, 105 S.Ct. 2399, 85 L.Ed.2d 753 (1985).
When the Supreme Court held in Sherrill that the OIN could not “rekindl[e] embers of sovereignty that long ago grew cold,” 544 U.S. at 214, 125 S.Ct. 1478, the sovereignty to which it was referring was of the sort described in Worcester and its progeny. Indeed, the decision of this Court that Sherrill reversed had focused on this land-based “Indian sovereignty doctrine,” Oneida Indian Nation of N.Y., 337 F.3d at 155(internal quotation marks omitted), that had emerged from Worcester and other 19th century cases, see id. at 153-55. The Supreme Court applied this doctrine to the facts at hand in Sherrill when rejecting the OIN’s prayer for relief.
That doctrine is different, however, from the doctrine of tribal immunity from suit. While the tax exemption of reservation land arises from a tribe’s exercise of sovereignty over such land, and is therefore closely tied to the question of whether the specific parcel at issue is “Indian reservation land,” Cass County, Minn. v. Leech Lake Band of Chippewa Indians, 524 U.S. 103, 110, 118 S.Ct. 1904, 141 L.Ed.2d 90 (1998), a tribe’s immunity from suit is independent of its lands.6 See [158]*158Kiowa Tribe of Okla. v. Mfg. Tech., Inc., 523 U.S. 751, 754, 118 S.Ct. 1700, 140 L.Ed.2d 981 (1998) (“[0]ur cases have sustained tribal immunity from suit without drawing a distinction based on where the tribal activities occurred.”).
The doctrine of tribal immunity from suit has a distinctive history in the Supreme Court. As the Court explained in Kiowa:
Though the doctrine of tribal immunity [from suit] is settled law and controls this case, we note that it developed almost by accident. The doctrine is said by some of our own opinions to rest on the Court’s opinion in Turner v. United States, 248 U.S. 354, 39 S.Ct. 109, 63 L.Ed. 291 (1919). Though Turner is indeed cited as authority for the immunity, examination shows it simply does not stand for that proposition.
Turner’s passing reference to immunity, however, did become an explicit holding that tribes had immunity from suit. We so held in [United States v. U.S. Fidelity & Guar. Co., 309 U.S. 506, 60 S.Ct. 653, 84 L.Ed. 894 (1940)], saying: “These Indian Nations are exempt from suit without Congressional authorization.” [Id.] at 512, 60 S.Ct. 653 (citing Turner, supra, at 358, 39 S.Ct. 109). As sovereigns or quasi sovereigns, the Indian Nations enjoyed immunity “from judicial attack” absent consent to be sued. Later cases, albeit with little analysis, reiterated the doctrine.
The doctrine of tribal immunity came under attack a few years ago in [Okla. Tax Comm’n v. Citizen Band] Potawatomi [Indian Tribe of Okla., 498 U.S. 505, 111 S.Ct. 905, 112 L.Ed.2d 1112 (1991)].... We retained the doctrine, however, on the theory that Congress had failed to abrogate it....
[There are] considerations [that] might suggest a need to abrogate tribal immunity, at least as an overarching rule. Respondent does not ask us to repudiate the principle outright, but suggests instead that we confine it to reservations or to noncommercial activities. We decline to draw this distinction in this case, as we defer to the role Congress may wish to exercise in this important judgment.
Congress has acted against the background of our decisions. It has restricted tribal immunity from suit in limited circumstances. And in other statutes it has declared an intention not to alter it.
Congress “has occasionally authorized limited classes of suits against Indian tribes” and “has always been at liberty to dispense with such tribal immunity or to limit it.” Potawatomi, supra, at 510, 111 S.Ct. 905. It has not yet done so.
523 U.S. at 756-59, 118 S.Ct. 1700 (citations omitted).
The Kiowa Court highlighted the separate and independent natures of the doctrines of tribal immunity from taxation and other powers of the state, and tribal immunity from suit that controls the case at bar:
We have recognized that a State may have authority to tax or regulate tribal activities occurring within the State but outside Indian country. To say substantive state laws apply to off-reservation conduct, however, is not to say that a tribe no longer enjoys immunity from suit. In Potawatomi, for example, we reaffirmed that while Oklahoma may tax cigarette sales by a Tribe’s store to nonmembers, the Tribe enjoys immunity from a suit to collect unpaid state taxes. There is a difference between the right to demand compliance with state laws and the means available to enforce them.
[159]*159Id. at 755, 118 S.Ct. 1700. (citations omitted).
While the doctrine of tribal sovereign authority over land has “undergone considerable evolution [in the Supreme Court] in response to changed circumstances,” McClanahan v. State Tax Comm’n of Ariz., 411 U.S. 164, 171, 93 S.Ct. 1257, 36 L.Ed.2d 129 (1973), the doctrine of tribal immunity from suit has not. The Kiowa Court indicated in the portion of the opinion set forth above that it looks to Congress for any such change.
In light of this history, we do not read Sherrill as implicitly abrogating the OIN’s immunity from suit. No such statement of abrogation was made by the Sherrill Court, nor does the opinion call into question the Kiowa Court’s approach, that any such abrogation should be left to Congress. Sherrill dealt with “the right to demand compliance with state laws.” Kiowa, 523 U.S. at 755, 118 S.Ct. 1700. It did not address “the means available to enforce” those laws. Id.
B. Application to the Case at Bar
We are left then with the rule stated in Kioiua: “As a matter of federal law, an Indian tribe is subject to suit only where Congress has authorized the suit or the tribe has waived its immunity.” Id. at 754, 118 S.Ct. 1700. We therefore agree with the district court that the remedy of foreclosure is not available to the Counties unless and until Congress authorizes such suits or the OIN consents to such suits. Because neither of these events has occurred, the foreclosure actions are barred by the OIN’s immunity from suit.
The Counties argue that the notion that they may tax but not foreclose is inconsistent and contradictory. To be sure, the result is reminiscent of words of the nursery rhyme:
Mother, may I go out to swim? Yes, my darling daughter; Hang your clothes on a hickory limb, And don’t go near the water.7
Or,' as the Counties more soberly assert, such a rule “eviscerates” Sherrill, “making that essential right of government [to tax properties] meaningless.” Appellants’ Br. at 51.
But a similar argument was rejected by the Supreme Court in Potawatomi8 There, the Court held that Oklahoma had the authority to tax certain cigarette sales made at the tribe’s convenience store. Potawatomi, 498 U.S. at 512, 111 S.Ct. 905. The Court also ruled that the tribe’s immunity from suit prevented the state from bringing suit to collect unpaid taxes. The Court reconciled these two rulings thus:
Oklahoma complains that, in effect, decisions such as Moe[ v. Confederated Sal[160]*160ish and Kootenai Tribes of Flathead Reservation, 425 U.S. 463, 96 S.Ct. 1634, 48 L.Ed.2d 96 (1976),] and [Washington v. Confederated Tribes of] Colville [Reservation, 447 U.S. 134, 100 S.Ct. 2069, 65 L.Ed.2d 10 (1980), (authorizing taxation in certain circumstances)] give them a right without any remedy. There is no doubt that sovereign immunity bars the State from pursuing the most efficient remedy, but we are not persuaded that it lacks any adequate alternatives. We have never held that individual agents or officers of a tribe are not liable for damages in actions brought by the State.... States may also enter into agreements with the tribes to adopt a mutually satisfactory regime for the collection of this sort of tax. And if Oklahoma and other States similarly situated find that none of these alternatives produce the revenues to which they are entitled, they may of course seek appropriate legislation from Congress.
498 U.S. at 514, 111 S.Ct. 905 (citations omitted).
Individual tribal members and tribal officers in their official capacity remain susceptible to suits for damages and injunctive relief. See Puyallup Tribe, Inc. v. Dep’t of Game of State of Wash., 433 U.S. 165, 171, 97 S.Ct. 2616, 53 L.Ed.2d 667 (1977) (“[W]hether or not the Tribe itself may be sued in a state court without its consent or that of Congress, a suit to enjoin violations of state law by individual tribal members is permissible.”). They may therefore be enjoined from violations of state law. But if such enforcement mechanisms fail and if no agreement can be reached between the Counties and the OIN, the Counties’ ultimate recourse will be to Congress, as we understand the Supreme Court to have instructed.
Because we affirm on the ground that the foreclosure actions are barred by the OIN’s sovereign immunity from suit, we need not and do not reach the other three rationales relied upon by the district court.
III. Abstention
The Counties argue that the district court “erred as a matter of law in refusing to abstain from interfering with the Counties’ tax foreclosure process.” Appellants’ Br. at 105. “We evaluate a district court’s determination not to abstain ... de novo, because it implicates the court’s subject matter jurisdiction.” Hartford Courant Co. v. Pellegrino, 380 F.3d 83, 90 (2d Cir.2004). We agree with the district court, see Madison County, 401 F.Supp.2d at 225, that abstention is not appropriate here.
The Counties’ abstention argument appears to be based on 28 U.S.C. § 1341, which states that “[t]he district courts shall not enjoin, suspend or restrain the assessment, levy or collection of any tax under State law where a plain, speedy and efficient remedy may be had in the courts of such State.” As the Counties note, though, in Moe v. Confederated Salish and Kootenai Tribes of Flathead Reservation, 425 U.S. 463, 96 S.Ct. 1634, 48 L.Ed.2d 96 (1976), the Supreme Court created an “exception to the general rule barring federal interference with state tax administration.” Appellants’ Br. at 106. The Moe Court concluded that Indian tribes should be permitted to bring federal lawsuits that the United States could have brought on a tribe’s behalf as trustee — -a principle that the Court found expressed in the legislative history of 28 U.S.C. § 1362, which provides that “[t]he district courts shall have original jurisdiction of all civil actions, brought by any Indian tribe or band with a governing body duly recognized by the Secretary of the Interior, wherein the matter in controversy arises under the Constitution, laws, or treaties of the United [161]*161States.” The Court decided that inasmuch as “the United States [was] not barred by § 1341 from seeking to enjoin the enforcement of a state tax law, ... the Tribe [was] not barred from doing so.... ” Moe, 425 U.S. at 474-75, 96 S.Ct. 1634 (citation omitted).
The Counties argue that this exception is inapplicable here because “Sherrill held that local government — and not OIN — has full sovereignty over the land at issue.” Appellants’ Br. at 106. But Moe does not depend on whether a tribe has sovereignty over any particular land. We perceive no reason why, because of Sherrill or otherwise, the holding of Moe should not apply to the case at bar. Accordingly, we decline to order the district court to abstain from exercising jurisdiction over this matter.
IV. Stockbridge’s Motion to Intervene
Stockbridge appeals from the district court’s denial of its motion to intervene in the Oneida County litigation as a matter of right pursuant to Federal Rule of Civil Procedure 24(a)(2).9 We review the district court’s denial of a Rule 24(a) motion for abuse of discretion. Brennan v. N.Y.C. Bd. of Educ., 260 F.3d 123, 128 (2d Cir.2001).
Rule 24(a)(2) states: “On timely motion, the [district] 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.”
Intervention as of right under Rule 24(a)(2) is granted when all four of the following conditions are met: (1) the motion is timely; (2) the applicant asserts an interest relating to the property or transaction that is the subject of the action; (3) the applicant is so situated that without intervention, disposition of the action may, as a practical matter, impair or impede the applicant’s ability to protect its interest; and (4) the applicant’s interest is not adequately represented by the other parties.
MasterCard Int’l Inc. v. Visa Int’l Serv. Ass’n, Inc., 471 F.3d 377, 389 (2d Cir.2006).
Stockbridge sought to intervene for the sole purpose of seeking dismissal of this case insofar as it relates to the parcels of land that are allegedly part of the Stockbridge reservation. The ground for dismissal that Stockbridge proposed to assert was that “Stockbridge is a necessary and indispensable party which enjoys sovereign immunity from suit and cannot be forced to join this action. In its absence, the suit cannot proceed and must be dismissed as to all Oneida County lands situated within the 1788 Stockbridge treaty reservation.” Stockbridge Mot. to Intervene at 2, Oneida County, dated November 25, 2005. In other words, Stockbridge asserts that it is a required party under Federal Rule of Civil Procedure 19(a)(1), but that joinder is not feasible as a result of Stockbridge’s immunity from suit, and [162]*162dismissal is therefore warranted under Rule 19(b) because Stockbridge is an indispensable party under that rule.
Rule 19(a), governing “Required Joinder of Parties,” and Rule 24(a)(2), covering “Intervention of Right,”10 which Stockbridge asserts its claim here, “are intended to mirror each other.” MasterCard, 471 F.3d at 390. Rule 19(a) requires parties to be joined if joinder is feasible and if the parties are necessary to “accord complete relief among existing parties,” Fed.R.Civ.P. 19(a)(1)(A), or if, under specified circumstances, disposing of the case without that party might “(i) as a practical matter impair or impede the person’s ability to protect the interest; or (ii) leave an existing party subject to a substantial risk of incurring double, multiple, or otherwise inconsistent obligations because of the interest,” Fed.R.Civ.P. 19(a)(1)(B).11 “[I]f a party is not ‘necessary’ under Rule 19(a), then it cannot satisfy the test for intervention as of right under Rule 24(a)(2).” MasterCard, 471 F.3d at 389.
Stockbridge argues that it is a necessary party under both Rule 19(a)(l)(B)(i) and (ii) because disposing of this matter in its absence might “as a practical matter impair or impede Stockbridge’s ability to protect its interest” relating to the subject of the action, Stockbridge Br. at 8, and might also “leave the County subject to a substantial risk of incurring double, multiple, or otherwise inconsistent obligations,” id. at 48.12 But under either theory, Stock-bridge must first show that it “claims an interest relating to the subject of the action.” Fed. R. of Civ. P. 19(a)(1)(B). As explained in MasterCard, 471 F.3d at 390, and discussed above, Rule 24 requires a similar showing if Stockbridge is to establish the ability to intervene as a matter of right.
The district court determined that Stockbridge lacked an interest in the instant litigation and therefore denied its motion to intervene. Oneida County, 432 F.Supp.2d at 292. We agree.
[F]or an interest to be cognizable under Rule 24(a)(2), it must be direct, substantial, and legally protectable. An interest that is remote from the subject matter of the proceeding, or that is contingent upon the occurrence of a sequence of events before it becomes colorable, will not satisfy the rule.
Brennan, 260 F.3d at 129 (citations and internal quotation marks omitted). Stockbridge’s purported interest in this case stems from the fact that it is currently [163]*163involved in litigation in which it is asserting that a portion of the land at issue here is in fact part of the Stockbridge reservation. See Stockbridge-Munsee v. State of New York, No. 3:86-CV-1140 (N.D.N.Y. Oct. 15, 1986).13 Stockbridge is therefore concerned that the present litigation could hinder its efforts to protect its property-interest in that land.
The parties to this litigation do not, however, purport to put at issue the boundaries of the OIN’s or Stockbridge’s reservation. Nor, with the exception of the OIN’s claims under state law, do the Tribe’s arguments so much as touch on the issue of the continued existence of the reservation irrespective of its boundaries. We think that Sherrill’s rejection of the “unification theory,” 544 U.S. at 214, 125 S.Ct. 1478, under which the OIN argued that it had “unified fee and aboriginal title and may [therefore] assert sovereign dominion over the parcels,” id. at 213, 125 S.Ct. 1478, has taken the question of the reservation boundaries off the table for purposes of this appeal. What is relevant now is the OIN’s assertion that it is immune from suit even if it does not have sovereign control over the land in question. The Counties’ contrary assertion is that they can foreclose on land owned by the OIN irrespective of whether it is now or ever was part of the tribe’s reservation. Stockbridge’s interest in this litigation is therefore remote at best, because these assertions are unrelated to the question of reservation boundaries.14
Finally, we note that the manner in which we decide this appeal also renders minimal the likelihood that Stockbridge will be prejudiced by its failure to be allowed to intervene.15
CONCLUSION
For the foregoing reasons, we affirm the judgment of the district court.