Chevron Deference & Major Questions Doctrine — Judicial Review of Agency Interpretation
For 40 years, Chevron deference (Chevron U.S.A. v. Natural Resources Defense Council, 1984) was the most important principle in administrative law: when a federal statute was ambiguous and the responsible agency had adopted a reasonable interpretation, courts would defer to the agency's reading rather than impose their own. Chevron rested on two assumptions: that Congress intended ambiguities to be resolved by expert agencies, and that agencies — with their technical expertise and political accountability — were better positioned than courts to make policy-laden interpretive choices. In June 2024, the Supreme Court overruled Chevron in Loper Bright Enterprises v. Raimondo, holding that courts must exercise their own independent judgment in interpreting statutes — the Administrative Procedure Act (5 U.S.C. § 706) requires courts to "decide all relevant questions of law," and Chevron improperly transferred that responsibility to agencies. Alongside Chevron's demise, the major questions doctrine has emerged as the dominant constraint on agency authority: agencies cannot resolve questions of vast economic and political significance without clear congressional authorization — a doctrine the Supreme Court applied in West Virginia v. EPA (2022) to strike down EPA's Clean Power Plan and in Biden v. Nebraska (2023) to block the student loan forgiveness program. Together, the end of Chevron and the rise of the major questions doctrine represent the most significant shift in the balance of power between agencies, courts, and Congress in a generation.
Current Law (2026)
| Parameter | Value |
|---|---|
| Chevron status | Overruled by Loper Bright Enterprises v. Raimondo (2024) |
| Current standard | Courts exercise independent judgment on statutory interpretation (APA § 706) |
| Skidmore deference | Survives — agency interpretations are persuasive based on their "power to persuade" (thoroughness, reasoning, consistency) |
| Major questions doctrine | Agencies need "clear congressional authorization" for rules of vast economic/political significance |
| Key cases | Chevron (1984, overruled), Loper Bright (2024), West Virginia v. EPA (2022), Biden v. Nebraska (2023) |
| Affected agencies | All federal agencies that interpret statutes they administer |
| APA provision | 5 U.S.C. § 706 — courts shall "decide all relevant questions of law" and "interpret constitutional and statutory provisions" |
Legal Authority
- 5 U.S.C. § 706 — Scope of judicial review (the reviewing court shall decide all relevant questions of law, interpret constitutional and statutory provisions, and determine the meaning or applicability of agency action — the statutory basis for Loper Bright's holding that courts, not agencies, interpret statutes)
- 5 U.S.C. § 553 — Informal rulemaking procedures (notice-and-comment rulemaking produces the regulations whose interpretive authority is now subject to independent judicial review rather than Chevron deference)
How It Works
From 1984 through 2024, Chevron deference governed how courts reviewed agency statutory interpretation. Under Chevron's two-step framework: if Congress has directly spoken to the precise question, that resolves it (Step One); if the statute is ambiguous, courts defer to the agency's interpretation as long as it is permissible (reasonable), even if the court would have read it differently (Step Two). Applied in thousands of cases across environmental, tax, immigration, healthcare, financial, and telecommunications regulation, Chevron gave agencies significant freedom to interpret the statutes they administer. In Loper Bright Enterprises v. Raimondo (2024), the Supreme Court held that Chevron was "fundamentally misguided" and overruled it: the APA requires courts to exercise independent judgment on questions of statutory interpretation, not defer to agency readings simply because a statute is ambiguous. Courts may still apply Skidmore deference — weight proportional to an agency interpretation's persuasiveness based on the thoroughness of the agency's analysis, the validity of its reasoning, and its consistency over time — but Skidmore is case-by-case and much weaker; courts are free to reject well-reasoned agency interpretations if they reach a different conclusion.
Separate from Chevron, the major questions doctrine holds that agencies may not exercise authority to resolve questions of vast economic and political significance unless Congress has clearly authorized that specific exercise of power. The doctrine prevents agencies from reading sweeping regulatory authority into vague or ancillary statutory provisions. The Supreme Court has applied it to: strike EPA's generation-shifting Clean Power Plan (West Virginia v. EPA, 2022), block $430 billion in student loan forgiveness (Biden v. Nebraska, 2023), end the CDC's eviction moratorium (Alabama Association of Realtors v. HHS, 2021), and invalidate OSHA's vaccine-or-test mandate for large employers (NFIB v. OSHA, 2022). Together, Loper Bright and the major questions doctrine represent the most significant restructuring of administrative law in decades — shifting interpretive power from agencies to courts and constraining broad regulatory assertions.
How It Affects You
If you're a regulated business challenging an agency rule: Loper Bright (2024) fundamentally changed the litigation calculus. Before, if a statute was ambiguous, courts deferred to the agency's reasonable reading — making agency rules very hard to overturn on statutory grounds. Now, courts decide for themselves what the statute means, and "the agency interpreted its ambiguous statute reasonably" is no longer a winning defense. This opens real litigation opportunities for businesses facing agency rules that stretch statutory text. The best arguments under Loper Bright: (1) the statute's plain text doesn't reach this conduct, (2) the statutory structure shows Congress didn't authorize this specific rule, and (3) the legislative history confirms Congress never intended this reading. For rules that are genuinely transformative — covering large economic stakes or politically significant subject matter — add a major questions doctrine argument: the agency needs a "clear statement" from Congress, not just an ambiguous grant of general authority. Cases worth tracking as litigation templates: the Fifth Circuit's vacatur of SEC climate disclosure rules, and ongoing challenges to CFPB authority after CFPB v. CFSA (2024) upheld CFPB's funding structure but left interpretive questions open.
If you work at a federal agency writing or defending regulations: The post-Loper Bright world requires stronger statutory justification in every rule's preamble. The Skidmore "power to persuade" standard that now applies in ambiguous cases depends on the quality of your agency's reasoning — well-documented interpretive analysis, consistent agency position, and demonstrated expertise still carry weight, but they must affirmatively persuade a court rather than just survive rational-basis review. Practically: build the statutory case for your rule as if you're writing a brief, not an administrative record. Identify the specific statutory provision that authorizes the specific action, quote the text, and explain why that text — not just the agency's judgment — compels the reading you've adopted. For major regulatory programs (the kind that would trigger the major questions doctrine), ensure there is an unambiguous statutory authorization — or work with Congress to provide one before the rule is challenged. The Office of Legal Counsel and your agency's general counsel office should be involved early in rulemaking for high-stakes interpretive questions.
If you're in Congress writing or rewriting regulatory statutes: The practical lesson of Loper Bright and the major questions doctrine is that drafting precision now matters more than it did under Chevron. When you want an agency to have broad discretion to address an emerging problem, say so clearly — grant authority to regulate "in any manner the agency determines necessary and appropriate" rather than relying on ambiguous "reasonably necessary" provisions. When you want to constrain agency discretion, use specific procedural requirements, enumerated lists, or explicit limits on regulatory scope. The ambiguous statute that Chevron once saved from litigation is now an invitation to courts to impose their own interpretive preferences. Clear legislative mandates are now the only reliable way to ensure agency action survives review. See also Administrative Procedure Act for the judicial review framework agencies operate within.
If you're an environmental, public health, or consumer advocate: The Loper Bright era is harder terrain for protective regulation. Rules that pushed the statutory envelope under Chevron — EPA's broad interpretations of "best available technology" under the Clean Air Act, OSHA's expansive reading of "feasibility" in health standards, SEC rules addressing emerging market risks — face real reversal risk under independent judicial review. The strategic response: advocate not just for new agency rules but for new statutory authority that clearly authorizes those rules. Administrative advocacy is necessary but no longer sufficient; legislative advocacy to ensure agencies have unambiguous statutory power is the only durable strategy. Short-term: monitor appeals court panels for Loper Bright challenges to existing rules in your policy area — courts in the Fifth and Eleventh Circuits have been most aggressive. Resources: RegWatch at the Administrative Law Review, Georgetown's Institute for Constitutional Advocacy, and regulations.gov for tracking challenge filings.
State Variations
Chevron and the major questions doctrine are federal judicial doctrines:
- State courts are not bound by Loper Bright — they may continue to apply Chevron-like deference to state agency interpretations under state administrative procedure acts
- Some states have already adopted their own versions of reduced deference
- State legislatures may codify deference standards by statute
- The practical impact varies: states with strong deference traditions may see less change than the federal system
Implementing Regulations
Chevron deference and the major questions doctrine are judicial doctrines — they do not have implementing regulations. They shape how courts review agency regulations across all areas of federal law.
- Following the Supreme Court's 2024 decision in Loper Bright Enterprises v. Raimondo, Chevron deference has been overruled — courts now exercise independent judgment when interpreting ambiguous statutes rather than deferring to agency interpretations
- The major questions doctrine (from West Virginia v. EPA, 2022) requires clear congressional authorization for agency actions of vast economic or political significance
Pending Legislation
No standalone Chevron/major questions legislation has been introduced in the 119th Congress. Administrative law and judicial review provisions appear in broader regulatory reform legislation — see Administrative Procedure Act and Regulatory Reform.
Recent Developments
Loper Bright (2024) is generating a wave of litigation challenging existing agency regulations — parties are arguing that regulations previously upheld under Chevron should be reconsidered under independent judicial review. The stare decisis question — whether prior Chevron-era decisions remain binding — is being litigated across the circuits. The major questions doctrine continues to expand, with litigants invoking it against a wide range of agency actions. The combined effect of Loper Bright and the major questions doctrine is a fundamental rebalancing of power from agencies to courts and Congress — the most significant shift in administrative law since the APA was enacted in 1946.