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Colorado Joins Coalition Lawsuit Challenging Federal Fuel Economy Rollbacks

National Highway Traffic Safety AdministrationOctober 2, 2026Colorado Attorney General

Summary

Colorado joined a coalition of states and local governments in suing the National Highway Traffic Safety Administration over its rule weakening fuel economy standards for new passenger cars and light trucks. The coalition alleges the rule violates federal law; the press release does not report a penalty or a court ruling.

Contract Impact

This action does not allege a privacy violation and does not identify privacy-related contract changes. Automotive companies and fleet operators may nevertheless want to review vehicle procurement and fleet-management agreements, supplier compliance representations, fuel-economy data and reporting obligations, and regulatory-change clauses for allocation of risk if applicable CAFE requirements change.

Contract Search Terms

CAFE standards compliancefuel economy requirementsvehicle fleet efficiencyfuel economy data reportingvehicle emissions complianceautomotive regulatory change clausefleet turnover assumptions

Laws Cited

Administrative Procedure ActEnergy Policy and Conservation Act

Violation Types

Entity Details

Entity

National Highway Traffic Safety Administration

Industry

Other

Multistate Coalition

CaliforniaArizonaConnecticutDelawareHawai‘iIllinoisMaineMarylandMassachusettsMichiganMinnesotaNew JerseyNew MexicoNew YorkNorth CarolinaOregonRhode IslandVermontWashingtonWisconsinDistrict of ColumbiaCity of ChicagoCity and County of DenverCity of New YorkCity and County of San Francisco

Official Sources

Source Evidence

Entity Name
"filing a lawsuit against the National Highway Traffic Safety Administration"
Event Date
"Oct. 2, 2026"
Laws Cited
"violates the Administrative Procedure Act and the Energy Policy and Conservation Act."
Violation Description
"the coalition alleges that NHTSA’s final rule is arbitrary and capricious and violates the Administrative Procedure Act and the Energy Policy and Conservation Act."
Is Multistate
"joined a coalition of 27 states, counties, and cities"

Related Enforcement Actions

CT

National Highway Traffic Safety Administration

Connecticut Attorney General William Tong joined a coalition of states and local governments in filing suit against NHTSA over its rule weakening fuel economy standards for new passenger cars and light trucks. The lawsuit alleges the rule violates the agency’s statutory mandate and the Administrative Procedure Act; no penalty or final remedy is reported.

MN

National Highway Traffic Safety Administration

Minnesota Attorney General Keith Ellison and a coalition of 26 states, counties, and cities filed a lawsuit challenging NHTSA’s rule weakening fuel-economy standards for new cars and light trucks. The coalition alleges the rule violates the Administrative Procedure Act and the Energy Policy and Conservation Act; the press release describes a lawsuit filing, not a monetary penalty or final judgment.

CO

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CO

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CO

U.S. Department of Labor

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CO

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