Published on: 2024-05010. Final rule. 2024-05010. Improvements for Heavy-Duty Engine and Vehicle Fuel Efficiency Test Procedures, and Other Technical Amendments
Published on: 2022-17134. Proposed rule. 2022-17134. Improvements for Heavy-Duty Engine and Vehicle Fuel Efficiency Test Procedures, and Other Technical Amendments
Published on: 2016-21203. Final rule. 2016-21203. Greenhouse Gas Emissions and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles-Phase 2
Published on: 2015-15500. Proposed rule. 2015-15500. Greenhouse Gas Emissions and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles-Phase 2
Published on: 2013-19880. Partial withdrawal of direct final rule; direct final rule. 2013-19880. Heavy-Duty Engine and Vehicle and Nonroad Technical Amendments
Published on: 2011-24978. Correcting amendments. 2011-24978. Greenhouse Gas Emissions Standards and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles
Published on: 2011-20740. Final Rules. 2011-20740. Greenhouse Gas Emissions Standards and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles