4. Analysis: Legal Reasoning and Precedents Cited
A. Jurisdiction: one approval implicating several environmental statutes
Section 10211 does not itself specify a judicial-review route. The court therefore looked to the statutes governing the underlying programs. It relied on direct-review provisions including 33 U.S.C. § 1369(b)(1), governing specified Clean Water Act actions, and corresponding provisions governing Clean Air Act, Safe Drinking Water Act, and Resource Conservation and Recovery Act decisions.
FW/PBS, Inc. v. City of Dallas, 493 U.S. 215 (1990), supplied the threshold principle that an appellate court must independently establish its jurisdiction even when the parties agree that jurisdiction exists. Their agreement could not cure a jurisdictional defect.
For programs not independently subject to exclusive appellate review, the court invoked the “inescapably intertwined” reasoning reflected in Soul Quest Church of Mother Earth, Inc. v. U.S. Att'y Gen., 92 F.4th 953 (11th Cir. 2023), and Ctr. for Biological Diversity v. EPA, 861 F.3d 174 (D.C. Cir. 2017). The decisive connection was that all the challenged extensions arose from the same agency decision applying the same statutory provision.
This jurisdictional analysis avoids fragmented litigation over a unified approval. It should nevertheless be understood as a conclusion about the closely integrated action before the court, not a universal rule that every EPA decision involving several statutes belongs exclusively in a court of appeals.
B. Independent statutory interpretation after agency deference
The Administrative Procedure Act required the court to set aside agency action that was arbitrary, capricious, an abuse of discretion, or otherwise contrary to law. Am. Wild Horse Campaign v. Raby, 144 F.4th 1178 (10th Cir. 2025), supported the proposition that an agency acts unlawfully when an erroneous legal interpretation leads it beyond its statutory authority.
The controlling interpretive framework came from Loper Bright Enters. v. Raimondo, 603 U.S. 369 (2024). The court had to exercise independent judgment and identify the statute’s best reading. Statutory ambiguity would not, by itself, require acceptance of EPA’s interpretation.
At the same time, Loper Bright Enters. v. Raimondo preserves the persuasive role of agency expertise described in Skidmore v. Swift & Co., 323 U.S. 134 (1944). An agency’s experience, reasoning, consistency, and historical practice may assist a court without controlling its judgment.
The majority applied this distinction separately to the disputed issues:
- Continuing statutory force: EPA’s consistent treatment of § 10211 as operative reinforced the majority’s textual conclusion.
- Power to impose conditions: EPA’s reversal between January and May 2025 undermined any claim to persuasive weight based on consistency. The court therefore did not afford that interpretation the same respect.
The outcome was not a wholesale endorsement of EPA’s interpretive authority. The majority agreed with the agency only after conducting its own analysis.
C. Continuing force: separating textual interpretation from the presumption against permanence
The historical foundation
Pawnee Nation relied on the rule that substantive provisions in appropriations legislation presumptively last only for the relevant fiscal period. The historical starting point was Minis v. United States, 40 U.S. (15 Pet.) 423 (1841). There, the government attempted to apply an 1835 appropriations restriction to commissions paid from later appropriations. The Supreme Court rejected that application because the restriction appeared in a temporary appropriations measure and did not clearly establish a permanent rule.
Three circuit decisions illustrated the presumption’s modern use:
- Bldg. & Constr. Trades Dep't, AFL-CIO v. Martin, 961 F.2d 269 (D.C. Cir. 1992), applied a strong presumption that substantive changes in an appropriations act operate only for the pertinent fiscal year unless permanence is clearly indicated.
- Atl. Fish Spotters Ass'n v. Evans, 321 F.3d 220 (1st Cir. 2003), likewise treated annual appropriations provisions as presumptively temporary and considered the statutory setting in determining duration.
- Tin Cup, LLC v. U.S. Army Corps of Eng'rs, 904 F.3d 1068 (9th Cir. 2018), emphasized the absence of a clear statement of futurity in holding a provision temporary.
The majority did not hold that these decisions were irrelevant in every setting. Instead, it asked an antecedent question: must the presumption influence the court’s interpretation from the outset, or does it operate only after ordinary interpretation leaves an ambiguity?
Why the majority required ambiguity first
Spector v. Norwegian Cruise Line Ltd., 545 U.S. 119 (2005), supplied the conceptual distinction between ordinary ambiguity-resolving presumptions and clear-statement rules that constrain even otherwise unambiguous language. Jones v. Hendrix, 599 U.S. 465 (2023), associated clear-statement rules with historically or constitutionally grounded norms that Congress would not ordinarily unsettle lightly.
The majority viewed the permanence presumption as grounded primarily in congressional rules governing appropriations legislation, rather than in a constitutional prohibition. United States v. Vulte, 233 U.S. 509 (1914), connected the relevant presumption to the nature of appropriations bills and congressional procedural rules. United States v. Will, 449 U.S. 200 (1980), and United States v. Dickerson, 310 U.S. 554 (1940), demonstrated that Congress nevertheless may change substantive law through appropriations legislation.
Accordingly, the majority refused to impose an exceptional clarity requirement before reading the statute. It found support in:
- Auburn Hous. Auth. v. Martinez, 277 F.3d 138 (2d Cir. 2002), which considered the relevant presumptions after identifying ambiguity;
- Yale New Haven Hosp. v. Becerra, 56 F.4th 9 (2d Cir. 2022), which distinguished an ambiguity-resolving presumption from a rule affecting the initial determination of meaning; and
- Vitrol, Inc. v. United States, 30 F.4th 248 (5th Cir. 2022), which declined to use a substantive canon to displace an unambiguous reading.
Callanan v. United States, 364 U.S. 587 (1961), furnished the majority’s central formulation: an interpretive aid resolves ambiguity; it should not create it. Barnhart v. Sigmon Coal Co., 534 U.S. 438 (2002), reinforced the primacy of unambiguous enacted language.
The majority also relied on United States v. Perry, 50 F. 743 (8th Cir. 1892), which recognized a permanent substantive change expressed in clear language despite its placement in an appropriations act. Under Iron Bar Holdings v. Cape, 131 F.4th 1153 (10th Cir. 2025), that predecessor-circuit decision was persuasive rather than binding authority.
The text and context of SAFETEA
Applying Robinson v. Shell Oil, 519 U.S. 337 (1997), the court considered the provision’s language, its immediate context, and the Act as a whole. Several features supported continuing force:
- Section 10211 contains no expiration date.
- SAFETEA’s preamble does not limit the whole Act to fiscal years 2005–2009.
- Congress expressly inserted expiration language elsewhere in SAFETEA but omitted it here.
- Other uncodified SAFETEA provisions remained subjects of congressional amendment long after 2009.
Keene Corp. v. United States, 508 U.S. 200 (1993), supported the inference that Congress’s inclusion of limiting language in some provisions and omission from another was deliberate. The court rejected the contention that missing “words of futurity” automatically created uncertainty: imposing that requirement would prematurely import the very presumption whose applicability remained to be established.
The majority cited Ocasio v. United States, 578 U.S. 282 (2016), for the demanding conception of unresolved ambiguity it applied after exhausting ordinary interpretive tools. That citation supported its refusal to treat statutory silence about duration as sufficient uncertainty by itself.
The provision’s absence from the United States Code did not establish expiration. Its enacted status as part of a public law mattered more than its subsequent editorial placement.
Administrative practice as confirmation
EPA’s treatment of § 10211(b) provided especially useful corroboration. The Citizen Potawatomi Nation and Oklahoma entered a cooperative agreement after September 2009; EPA subsequently approved the agreement and continued applying the cooperative-agreement requirement. A 2016 rulemaking also expressly treated subsection (b) as operative.
These practices were not substitutes for statutory text. Their role was confirmatory: they showed that the agency and affected participants had consistently treated the companion provision as continuing law.
The majority expressly left undecided whether the permanence presumption could apply to a multi-year authorization statute like SAFETEA if genuine ambiguity existed. That unresolved question is essential to distinguishing the majority holding from Judge Tymkovich’s concurrence.
D. Implied repeal and Indian-law canons
The presumption against implied repeals
Pawnee Nation argued that EPA’s interpretation partially displaced other federal laws and therefore conflicted with the presumption against implied repeals. Maine Cmty. Health Options v. United States, 590 U.S. 296 (2020), recognizes both the rarity of implied repeals and the presumption’s particular strength in the appropriations setting. J.E.M. Ag Supply, Inc. v. Pioneer Hi-Bred Int'l, Inc., 534 U.S. 124 (2001), similarly emphasizes the stringent standard for finding irreconcilable statutory conflict.
The majority treated this presumption, too, as ambiguity-dependent. Having found the rider’s continuing force unambiguous, it concluded that the presumption could not produce a contrary expiration date. Later, the rider’s express “notwithstanding” clause supplied a textual mechanism for resolving conflicting legal requirements.
The majority’s treatment of tribal-protective interpretation
Montana v. Blackfeet Tribe of Indians, 471 U.S. 759 (1985), states the familiar principle that statutes are construed liberally in favor of Indians, with ambiguous provisions interpreted to their benefit. Pawnee Nation relied on that principle to support both expiration and the preservation of EPA’s conditioning authority.
The majority emphasized the limiting instruction in South Carolina v. Catawba Indian Tribe, Inc., 476 U.S. 498 (1986): the canon does not authorize courts to invent ambiguity or disregard clearly expressed congressional intent. Negonsott v. Samuels, 507 U.S. 99 (1993), was particularly relevant because it declined to invoke the canon against an unambiguous congressional grant of state jurisdiction.
The majority distinguished two Tenth Circuit decisions:
- NLRB v. Pueblo of San Juan, 276 F.3d 1186 (10th Cir. 2002) (en banc), concerned a generally applicable labor statute that did not mention tribes. That silence did not divest a tribe of its sovereign authority to enact right-to-work legislation.
- EEOC v. Cherokee Nation, 871 F.2d 937 (10th Cir. 1989), found uncertainty where the relevant employment statute neither expressly included nor excluded tribal nations.
Section 10211(a), by contrast, expressly addresses state regulation in Indian country. For the majority, Congress had not left the basic state–tribal jurisdictional question unspoken.
Additional support came from United States v. Hebert, No. 24-7030 (10th Cir. Oct. 14, 2026) (en banc), which the majority cited as rejecting invocation of the Indian canon absent relevant statutory ambiguity. White Mountain Apache Tribe v. Bracker, 448 U.S. 136 (1980), and Cnty. of Yakima v. Confederated Tribes & Bands of the Yakima Indian Nation, 502 U.S. 251 (1992), likewise supplied formulations emphasizing generous resolution of ambiguity.
Sovereignty and sovereign immunity are not interchangeable
The most important disagreement concerned whether a broader clear-statement rule protected tribal sovereignty independently of textual ambiguity. The majority distinguished tribal sovereignty generally from sovereign immunity, the protection against suit without consent.
Santa Clara Pueblo v. Martinez, 436 U.S. 49 (1978), and Michigan v. Bay Mills Indian Cmty., 572 U.S. 782 (2014), require unequivocal congressional expression before tribal immunity is abrogated. The majority rejected the dissent’s use of those immunity decisions to establish an equally broad clear-statement requirement for every statutory intrusion upon tribal governmental interests.
The majority also reasoned that the rider would satisfy a clear-statement inquiry in any event: it expressly subordinates tribal regulatory interests to Oklahoma’s administration of the covered programs. Lac du Flambeau Band of Lake Superior Chippewa Indians v. Coughlin, 599 U.S. 382 (2023), supported the proposition that even a genuine clear-statement rule does not invariably demand particular “magic words.”
The historical discussion referenced Choate v. Trapp, 224 U.S. 665 (1912), and the concurrence in Arizona v. Navajo Nation, 599 U.S. 555 (2023), concerning the movement of Indian-law canons from treaty interpretation into statutory interpretation. These authorities informed the competing accounts of the canons’ foundations; neither independently resolved EPA’s conditioning power.
The decision should not be read as abolishing established treaty-protection or sovereign-immunity rules. Its operative conclusion concerns the interpretive rules the majority considered relevant to this express statutory allocation of environmental regulatory authority.
E. Why EPA could not impose the State-Tribal Engagement Condition
The majority offered three mutually reinforcing textual reasons.
1. “Shall approve” makes the approval duty mandatory
The statute directs EPA to approve a qualifying request. Lopez v. Davis, 531 U.S. 230 (2001), supported the distinction between mandatory statutory duties and discretionary agency choices. Marathon Oil Co. v. Lujan, 937 F.2d 498 (10th Cir. 1991), reinforced that agencies cannot avoid duties Congress intended them to perform.
For the majority, conditioning approval on an additional obligation would effectively allow EPA to withhold the approval Congress required. The enumerated statutory prerequisites were therefore exclusive for this extension mechanism.
2. The overriding clause defeats conflicting sources of authority
NLRB v. SW Gen., Inc., 580 U.S. 288 (2017), explains that a “notwithstanding” clause identifies which provision controls when legal requirements conflict. The majority accordingly held that other sources invoked to justify the added condition could not override § 10211(a)’s mandatory command.
This reasoning does not establish that every tribal-consultation policy is invalid or that EPA must avoid consultation. EPA actually consulted extensively during reconsideration. The holding is that a conflicting source of authority cannot justify attaching the additional state obligation at issue to this mandatory approval.
3. “The State program” means the previously approved program
The provision first introduces “a regulatory program” and then repeatedly refers to “the State program.” The majority treated the definite article as identifying the same program throughout.
Nielsen v. Preap, 586 U.S. 392 (2019), Baldwin Graphic Sys., Inc. v. Siebert, Inc., 512 F.3d 1338 (Fed. Cir. 2008), and GreenLatinos v. Suncor Energy, 184 F.4th 1171 (10th Cir. 2026), supported the grammatical premise that “the” ordinarily refers back to an already specified object. The majority then drew the substantive inference that a new, extra-legal condition would create a different program from the one previously approved outside Indian country.
This final inference was contested. The dissent accepted that the statute referred to an identified Oklahoma environmental program but rejected the proposition that an additional procedural engagement requirement necessarily changed that program’s identity.
Because EPA had not advanced this particular grammatical argument, the majority cited Kamen v. Kemper Fin. Servs., Inc., 500 U.S. 90 (1991), for the court’s authority to identify the proper construction of governing law when the relevant issue is already before it.
Why the earlier Oklahoma decision did not control
Pawnee Nation relied heavily on Oklahoma Department of Environmental Quality v. EPA, 740 F.3d 185 (D.C. Cir. 2014). That case addressed Oklahoma’s standing to challenge a federal Clean Air Act implementation plan. EPA had argued that Oklahoma’s injury was self-inflicted because the State could obtain authority under SAFETEA.
The D.C. Circuit rejected that standing argument partly because SAFETEA relief might not be certain or complete: EPA might attach conditions, and its interpretation might then receive judicial deference. The Tenth Circuit treated those observations as hypothetical reasoning about standing, not an authoritative interpretation of § 10211(a). They therefore did not establish an actual agency power to impose conditions. The later independent-review framework also undermined reliance on the earlier discussion of possible deference.
Pub. Serv. Co. of N.M. v. Barboan, 857 F.3d 1101 (10th Cir. 2017), supplied Pawnee Nation’s renewed tribal-protective construction argument. The majority rejected it for the same reason as before: it found the operative language unambiguous.
F. Why EPA did not need a contemporaneous compliance review
Pawnee Nation argued that § 10211(a) contains two independent prerequisites: a determination of federal compliance and approval outside Indian country. If the original approval already required compliance, it reasoned, the separate compliance clause must demand a fresh determination when Oklahoma requests extension.
The court agreed that the clauses identified separate requirements but rejected the proposed timing rule. United States v. Rentz, 777 F.3d 1105 (10th Cir. 2015) (en banc), encouraged attention to ordinary grammar. United States v. Ron Pair Enters., 489 U.S. 235 (1989), supported treating punctuation and coordinating language as evidence of distinct statutory clauses.
Neither principle, however, established that both acts had to occur again at the extension stage. The majority read the statute as a sequence: EPA determines compliance, approves the program outside Indian country, and then must grant a qualifying extension request. Earlier determinations could satisfy the sequence.
The court also rejected a decisive reliance on present-tense verbs. The approval clause itself uses the present tense, yet no party argued that every extension required a completely new approval outside Indian country. The statute could describe a recurring legal process without invalidating completed steps.
To answer the surplusage objection, the majority explained that the compliance language still addresses newly proposed programs and programs lacking current approval. It also emphasized that withdrawn or revoked approval would not remain a sufficient predicate merely because approval had existed at some point in the past.
The resulting distinction is important: EPA need not reopen an effective program approval solely because Oklahoma seeks geographic extension, but the underlying approval must remain current, and ordinary federal oversight continues. The decision does not declare obsolete programs permanently compliant or exempt Oklahoma from substantive environmental law.
5. The Separate Opinions
A. Judge Tymkovich’s concurrence: a narrower historical home for the permanence presumption
Judge Tymkovich would additionally hold that the presumption against permanence does not apply to a multi-year authorization act like SAFETEA. He viewed the cited applications of the presumption—including Minis v. United States, Bldg. & Constr. Trades Dep't, AFL-CIO v. Martin, Atl. Fish Spotters Ass'n v. Evans, and Tin Cup, LLC v. U.S. Army Corps of Eng'rs—as rooted in annual appropriations legislation.
He also discussed 31 U.S.C. § 1301(c), which expressly addresses permanence of appropriations in regular annual appropriations laws, and Smithsfork Grazing Ass'n v. Salazar, 564 F.3d 1210 (10th Cir. 2009), which applied that statutory requirement. Pawnee Nation had not invoked § 1301, and the majority did not decide its application here.
The concurrence added an alternative conclusion: even if the presumption applied, the rider would overcome it. Section 10211’s general regulatory subject matter was remote from transportation appropriations, and its text contained no temporal limitation. Drawing on Government Accountability Office materials and related authorities, the concurrence regarded that separation from the funding provisions as evidence of permanence.
These are additional views, not holdings adopted by the majority. The binding majority rationale leaves the presumption’s potential application to an ambiguous multi-year authorization statute unresolved.
B. Judge Federico’s dissent: a clear statement is required for the particular intrusion
The dissent’s central proposition was that Indian-law canons are not merely variations on one ambiguity-resolving rule. It distinguished liberal construction, ambiguity resolution, and a sovereignty-protective clear-statement requirement.
HRI, Inc. v. EPA, 198 F.3d 1224 (10th Cir. 2000), supported recognizing multiple tribal-protective interpretive principles. Ramah Navajo School Bd., Inc. v. Bureau of Revenue of New Mexico, 458 U.S. 832 (1982), emphasized generous construction consistent with tribal independence. At the same time, the dissent acknowledged the limitation reflected in Alaska Pac. Fisheries Co. v. United States, 248 U.S. 78 (1918): liberal construction is especially associated with legislation enacted for tribal benefit. Because this rider plainly favored Oklahoma, that particular rationale was weak here. Gundy v. United States, 588 U.S. 128 (2019), supported considering statutory purpose and context in identifying the appropriate interpretive approach.
The dissent instead located the decisive protection in retained sovereignty. It relied on NLRB v. Pueblo of San Juan and the immunity decisions to argue that courts should not infer a divestment of tribal governmental interests from silence. Montana v. United States, 450 U.S. 544 (1981), helped identify the range of tribal interests in political integrity, economic security, health, and welfare.
Iowa Mut. Ins. Co. v. LaPlante, 480 U.S. 9 (1987), and Merrion v. Jicarilla Apache Tribe, 455 U.S. 130 (1982), reinforced the inference that sovereign powers not affirmatively divested remain intact. Although Maralex Res., Inc. v. Barnhardt, 913 F.3d 1189 (10th Cir. 2019), cautions that statutory silence does not ordinarily create ambiguity, the dissent considered silence differently when a sovereignty-protective clear-statement rule applied.
The disagreement was therefore about the precision of Congress’s statement. Judge Federico agreed that Congress clearly authorized Oklahoma’s assumption of environmental program administration. He did not agree that Congress clearly prohibited EPA from preserving a lesser procedural role for tribes through notice and consultation.
C. Trust responsibility and environmental administration
The dissent grounded this distinction in the federal trust relationship. Seminole Nation v. United States, 316 U.S. 286 (1942), described demanding standards for governmental dealings with tribes. United States v. Mitchell, 463 U.S. 206 (1983), recognized the general trust relationship’s longstanding place in federal Indian law.
EPA’s 1984 Indian Policy translated respect for sovereignty into administrative practice. The dissent also drew support from Wash. Dep't. of Ecology v. EPA, 752 F.2d 1465 (9th Cir. 1985), Indian Country, U.S.A., Inc. v. Okla. ex rel. Okla. Tax Comm'n, 829 F.2d 967 (10th Cir. 1987), and Wisconsin v. EPA, 266 F.3d 741 (7th Cir. 2001), concerning tribal self-government and environmental regulatory authority.
Its historical discussion referenced Johnson v. M'Intosh, 21 U.S. (8 Wheat.) 543 (1823), and United States v. Lara, 541 U.S. 193 (2004), to explain the longer development of tribal sovereignty and federal authority. These references furnished background rather than direct rules governing the rider.
The dissent’s argument should not be confused with a holding that the general trust relationship independently creates every requested agency power or an enforceable damages remedy. The disagreement concerned how that relationship should inform construction of EPA’s existing statutory authority.
D. Mandatory approval need not exclude procedural discretion
Judge Federico rejected the majority’s assumption that a mandatory approval duty necessarily excludes discretion over how the approval is implemented. He cited Nat'l Ass'n of Home Builders v. Defs. of Wildlife, 551 U.S. 644 (2007), in discussing mandatory duties and their implementation. He also invoked McClellan v. Chipman, 164 U.S. 347 (1896), for the proposition that a greater power may encompass a lesser one.
In his view, Congress removed EPA’s ability to deny a qualifying extension outright but did not necessarily eliminate lesser protective measures. He read “without any further demonstration of authority” as addressing jurisdictional justification, including the framework associated with White Mountain Apache Tribe v. Bracker, rather than a prohibition on notice-and-consultation procedures.
The dissent also cited the concurrences in West Virginia v. EPA, 597 U.S. 697 (2022), and NFIB v. OSHA, 595 U.S. 109 (2022), for the distinction between ordinary ambiguity canons and stronger clear-statement protections. Their role was methodological; the dissent was not independently applying the major-questions doctrine to invalidate the approval.
E. Why the dissent sought remand rather than mandatory restoration
The dissent did not insist that EPA must necessarily impose the January condition. It accepted that EPA might possess discretion and choose not to exercise it. The legal defect, in its view, was EPA’s mistaken belief that it lacked discretion altogether.
SEC v. Chenery Corp., 318 U.S. 80 (1943), and Massachusetts v. EPA, 549 U.S. 497 (2007), supported evaluating the agency’s actual legal justification rather than substituting a different rationale. The majority likewise recognized this distinction: a decision based on perceived absence of power could not simply be defended as a discretionary refusal to exercise power.
Diné Citizens Against Ruining Our Env't v. Haaland, 59 F.4th 1016 (10th Cir. 2023), supplied the dissent’s APA review framework. Its proposed remedy was reconsideration under a correct understanding of authority, not an appellate order permanently prescribing the consultation condition.
6. Critical Assessment and Potential Impact
A. A durable, Oklahoma-specific allocation of authority
The decision forecloses the argument, within its precedential reach, that § 10211 simply expired with SAFETEA’s 2005–2009 funding provisions. Oklahoma may continue invoking the rider for qualifying programs. Because § 10211 expressly addresses Oklahoma, however, the decision does not create a comparable delegation mechanism for other states.
B. Less room for additional protections at the extension stage
The majority substantially limits EPA’s ability to use the § 10211(a) approval process to negotiate new tribal-protective requirements. The January condition was procedural and preserved state decision-making, yet the majority still found it unauthorized. That aspect makes the holding broader than a prohibition on giving tribes a veto over Oklahoma’s programs.
The practical consequence is that tribal participation must depend on other legally available mechanisms consistent with the rider: existing environmental-law procedures, state arrangements, federal oversight, or congressional amendment. The court did not adjudicate the validity of every possible mechanism.
C. The central interpretive tension: identity versus implementation
The majority’s grammatical analysis identifies a real textual link between the originally approved program and its extension. Its more contestable step is treating every new procedural approval condition as creating a different program. The dissent correctly isolates that additional inference: identifying the program does not, by grammar alone, settle every permissible feature of its administration.
The majority’s conclusion therefore rests most securely on the combined force of the mandatory command, overriding clause, and program-reference language—not on the definite article in isolation. Future cases may test the distinction between an impermissible new approval condition and an ordinary obligation already required by the underlying environmental statute.
D. Continuing oversight becomes more important
Because extension does not require a fresh, comprehensive program review, routine federal oversight carries greater practical significance. Existing approval cannot be treated as a permanent immunity from review. The majority expressly preserved EPA’s ordinary supervisory powers, including the consequences of program withdrawal or revocation.
Future litigation may therefore shift toward specific permits, enforcement decisions, oversight failures, or compliance with existing statutory duties rather than repeatedly reopening the rider’s general extension mechanism. Such disputes would require their own jurisdictional and merits analysis.
E. A significant dispute over the architecture of Indian-law interpretation
The majority places relevant tribal-protective canons after the initial determination of statutory clarity. The dissent would allow a sovereignty-protective clear-statement rule to shape that determination from the outset. This difference is consequential: under the first approach, a court’s ordinary textual reading can foreclose the canon; under the second, the canon helps establish what counts as sufficient clarity.
The decision’s reach must nevertheless be stated carefully. It does not eliminate tribal sovereignty, decide reservation boundaries, abolish tribal immunity, or independently determine the disposition of Pawnee Nation’s preexisting TAS authority. It resolves the legality of a particular EPA extension decision under a particular Oklahoma statute.
F. Legislative procedure explains the dispute but does not resolve it
The rider’s late insertion and scant deliberative history help explain tribal objections and uncertainty about congressional design. The majority nevertheless treated the enacted language as controlling. It did not hold the rider invalid because of the process through which it entered the bill.
That distinction underscores the decision’s broader institutional message: objections to a provision’s provenance cannot replace a demonstrated textual limitation, constitutional defect, or other legally sufficient basis for setting it aside.