154 F.4th 918
8th Cir.2025Background
- Statutory scheme: Congress directed DOE to determine "equivalent petroleum-based fuel economy values" for electric vehicles to be used by EPA in CAFE calculations, listing four factors DOE must consider. 49 U.S.C. § 32904(a)(2)(B).
- DOE historically calculated a petroleum-equivalency factor using multiple components (driving-pattern, transmission efficiency, accessory, and a relative-value/scarcity factor); in 2000 DOE included a 1/0.15 "fuel content" multiplier borrowed from section 32905 treatment of liquid/gaseous alternative fuels.
- In 2023 DOE proposed eliminating the 1/0.15 fuel content factor and using a forward-looking grid mix for model years 2027–2031; final 2024 rule instead phased out the fuel-content factor through 2030 and replaced the PEF with a "cumulative gasoline-equivalent fuel economy of electricity" computed across a 40-year survivability-weighted lifetime mileage schedule.
- Several states and the American Free Enterprise Chamber of Commerce challenged the final rule; the Alliance for Automotive Innovation intervened. The court considered standing, statutory authority, notice-and-comment compliance, severability, and remedy.
- Rulings in brief: court held petitioners had standing; DOE lacked statutory authority to retain/phase the 1/0.15 fuel-content factor; DOE’s lifetime (cumulative) methodology was a permissible statutory interpretation but was adopted without adequate notice-and-comment; the driving-pattern factor (1.0) was lawful; because the defects were non-severable, the court vacated and remanded the entire 2024 rule.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Standing | States will suffer concrete injuries (increased GHGs / sea-level rise; higher road-maintenance costs) traceable to DOE rule | DOE: harms are indirect/offset by fees and EPA standards; mootness argument based on later EPA rule | Plaintiffs had standing measured at suit commencement; case not moot (vacatur could redress injury) |
| Statutory authority for 1/0.15 fuel-content factor | Fuel-content factor exceeds §32904 authority; Congress omitted fuel-content treatment for EVs in §32905 so DOE may not artificially inflate EV fuel economy to incentivize EV production | DOE: §32904’s factor (conserve energy/scarcity/value) gives discretion to retain/phase a fuel-content factor to conserve petroleum and incentivize EVs | Court: DOE exceeded statutory authority; 1/0.15 multiplier not authorized by §32904 and contradicts DOE’s prior constructions — unlawful |
| Cumulative (lifetime) PEF methodology | DOE lacked authority to base PEF on 40-year survivability-weighted VMT and the annual future grid mix; and DOE failed to give adequate notice to permit comment | DOE: lifetime, survivability-weighted approach reasonably interprets statutory factors (generation/transmission efficiencies over a vehicle’s life) and was tied to its forward-looking proposal | Court: Interpretation permissible on the merits, but DOE violated APA notice-and-comment because this cumulative approach was not adequately described in the NPRM; remand required |
| Severability & Remedy | Petitioners: unlawful and procedurally defective provisions warrant vacatur and remand | DOE: if vacated, the prior 2000 rule (with 1/0.15) would return; vacatur would disrupt industry reliance and policy goals; suggest remand without vacatur | Court: defects are non-severable; substantive statutory violation requires vacatur and remand of the entire 2024 rule |
Key Cases Cited
- Massachusetts v. EPA, 549 U.S. 497 (2007) (coastal-state standing from GHG-driven sea-level rise)
- Loper Bright Enterprises v. Raimondo, 603 U.S. 369 (2024) (courts exercise independent judgment on whether agency acted within statutory authority)
- Whitman v. American Trucking Associations, 531 U.S. 457 (2001) (Congress unlikely to hide major policy changes in ancillary provisions)
- West Virginia v. EPA, 597 U.S. 697 (2022) (limits on agency power; mootness burden on defendant)
- Spokeo, Inc. v. Robins, 578 U.S. 330 (2016) (elements of Article III standing: concrete, particularized injury)
- NFIB v. OSHA, 595 U.S. 109 (2022) (agencies possess only authority Congress provided)
- Union Pacific R.R. Co. v. Surface Transp. Bd., 113 F.4th 823 (8th Cir. 2024) (agency actions must fall within statutory grant of authority)