Glossary

Major questions doctrine

A rule that agencies need clear authorization from Congress before deciding issues of vast economic or political significance.

Also called: MQD, major questions

The major questions doctrine holds that when a federal agency claims power to make a decision of great economic or political importance, courts should not assume Congress granted that power through vague or ambiguous statutory language. The agency must point to clear congressional authorization.

The idea appeared in earlier cases but was named and firmly applied in West Virginia v. EPA (2022), which limited the EPA's power to restructure the power-generation sector. The Court also relied on it in striking down the federal eviction moratorium (2021), the OSHA vaccine-or-test rule for large employers (2022) and the student-loan forgiveness program in Biden v. Nebraska (2023).

Supporters view the doctrine as a practical way to enforce separation of powers and the nondelegation doctrine without striking down statutes: big policy choices stay with Congress. Critics, including the dissenting justices in those cases, argue that the doctrine has no fixed definition of "major," lets judges pick which regulations to block, and ignores broad grants of power Congress deliberately wrote. Together with the end of chevron deference, it has reshaped how much room agencies have to act.

Last reviewed November 8, 2026

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Related terms

Nondelegation doctrine The principle that Congress may not hand its lawmaking power to agencies or others without clear limits on how it is used. Chevron deference A former rule requiring courts to accept a federal agency's reasonable reading of an ambiguous statute it administers. Loper Bright Enterprises v. Raimondo The 2024 Supreme Court decision overruling Chevron and requiring courts to use independent judgment in interpreting statutes agencies enforce. Administrative state A term for the federal agencies that make and enforce rules with binding effect, often seen as a fourth branch of government. Separation of powers The constitutional division of government into legislative, executive and judicial branches, each with its own distinct powers.