State of Iowa v. Council on Environmental Quality, 765 F.Supp.3d 859

Plaintiff States challenged the Council on Environmental Quality (CEQ)'s 2024 Rule updating regulations under the National Environmental Policy Act (NEPA), arguing it exceeded CEQ’s statutory authority and was arbitrary and capricious.
NEPA was enacted in 1969 to ensure federal agencies consider environmental impacts; it established CEQ to advise the President, but its initial guidelines were considered non-binding.
In 1977, President Carter directed CEQ by executive order to issue binding regulations, leading to the 1978 Rules, which subsequent administrations revised.
The 2024 Rule aimed to implement Congressional amendments from the 2023 Fiscal Responsibility Act, revert language to earlier versions, and clarify or reverse 2020 Trump-era changes.
The Court determined standing and ripeness were met, as Plaintiff States showed concrete, imminent injuries from compliance costs and project delays under the 2024 Rule.
Central to the decision was whether CEQ had legal authority to promulgate binding regulations beyond advisory guidelines under NEPA.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Whether CEQ has authority under NEPA to issue binding regulations	CEQ only empowered to give non-binding guidance; no explicit Congressional delegation to promulgate rules	CEQ’s authority implicit in NEPA and confirmed by presidential orders and judicial assumptions over time	CEQ lacks statutory authority; may only issue non-binding guidelines
Whether the 2024 Rule exceeds CEQ authority/grants CEQ substantive powers	The Rule changes NEPA from a procedural to a substantive statute, exceeding agency authority	Changes fit within CEQ’s mandate to guide environmental review and have judicial support	The 2024 Rule exceeds CEQ’s authority; procedural statute cannot be made substantive without Congressional action
Whether the 2024 Rule is arbitrary and capricious	The 2024 Rule made unreasoned changes, reversed longstanding guidance, imposed irrational requirements like mandatory indigenous knowledge evaluation	Explanations were reasonable, reflect updated policy, and follow adequate notice-and-comment procedures	The Rule is arbitrary/capricious in multiple respects; key changes lacked reasoned explanation or were internally incoherent
Severability and Remedy	Entire Rule must be vacated as all provisions are unauthorized; partial severance won’t cure illegality	If invalid, only sever specific provisions; vacatur is too disruptive nationwide	Entire 2024 Rule vacated; status quo ante restored

Department of Transportation v. Public Citizen, 541 U.S. 752 (Supreme Court noted NEPA establishes CEQ but didn’t analyze its authority; cited for background on NEPA regulations)
Andrus v. Sierra Club, 442 U.S. 347 (Supreme Court granted deference to CEQ but did not address source of regulatory authority)
Marsh v. Oregon Nat. Res. Council, 490 U.S. 360 (CEQ regulations held entitled to deference for NEPA compliance, but source of authority not directly addressed)
Youngstown Sheet & Tube Co. v. Sawyer, 343 U.S. 579 (seminal case on limits of presidential power in absence of Congressional authority)
Chrysler Corp. v. Brown, 441 U.S. 281 (executive order-based regulations must be anchored to actual Congressional delegation)
FDA v. Brown & Williamson Tobacco Corp., 529 U.S. 120 (reiterates agencies must be able to trace regulatory authority to explicit Congressional grant)
Methow Valley Citizens Council v. Robertson, 490 U.S. 332 (clarifies NEPA’s procedural — not substantive — nature)
Encino Motorcars, LLC v. Navarro, 579 U.S. 211 (agency policy change must be reasoned and consider reliance interests)
Lujan v. Defenders of Wildlife, 504 U.S. 555 (Article III standing requirements)