Laws & Regulations

Final Rule for Technical Amendments to the Highway and Nonroad Diesel Regulations

This action corrects errors and omissions from the previous rules, makes minor changes to the regulations to assist entities with regulatory compliance, and makes technical amendments that resulted from discussions with various diesel stakeholders.

List of Regulated Substances under the Risk Management Program

List of substances regulated by the Risk Management Plan rule.

Final Rule for Standards for Emissions From Natural Gas-Fueled, and Liquefied Petroleum Gas-Fueled Motor Vehicles and Motor Vehicle Engines, and Certification Procedures for Aftermarket Conversions

This rule provides emission standards and test procedures for the certification of new natural gasfueled, and liquefied petroleum gasfueled light-duty vehicles, light-duty trucks, heavy-duty engines and vehicles, and motorcycles.

Final Rule for Revised Carbon Monoxide (CO) Standard for Class I and II Nonhandheld New Nonroad Phase 1 Small Spark-Ignition Engines

Rule published November 13, 1996, addressing the CO emission difference between oxygenated and nonoxygenated fuels that was not reflected when the Agency previously set the CO standard for these nonhandheld engines in a final rule published July 3, 1995.

Final Rule for Revisions and Additions to Motor Vehicle Fuel Economy Label

EPA and the National Highway Traffic Safety Administration are revising the fuel economy and environment labels that appear on new vehicles beginning with 2013 models.

Final Rule for Regulation of Fuels and Fuel Additives: Modifications to the Transmix Provisions Under the Diesel Sulfur Program

Final Rule on Ozone Transport Commission; Low Emission Vehicle Program for the Northeast Ozone Transport Region

EPA is announcing its final determination that reduction of new motor vehicle emissions throughout the Northeast Ozone Transport Region (OTR) is necessary to mitigate the effects of air pollution transport.

Proposed Rule and Related Materials for Control of Air Pollution: Minor Amendments to Emission Requirements Applicable to Small Nonroad Spark-Ignition Engines and Marine Spark Ignition Engines

Final Rule for Phase 2 Emission Standards for New Nonroad Spark-Ignition Handheld Engines At or Below 19 Kilowatts and Minor Amendments to Emission Requirements Applicable to Small Spark-Ignition Engines and Marine Spark-Ignition Engines

Rule summary, rule history, CFR citations and additional resources concerning emissions standards for engines principally used in handheld lawn and garden equipment such as trimmers, leaf blowers, and chainsaws.

WIPP Pecos Management Reports

These reviews and evaluations compiled by Pecos Management Services, Inc. encompass the current and future WIPP activities in the program areas of TRU waste characterization, transportation, and disposal.

Proposed Rule for Modification of Federal On Board Diagnostic Regulations for: Light Duty Vehicles, Light Duty Trucks, Medium Duty Passenger Vehicles, Complete Heavy Duty Vehicles and Engines Intended for Use in Heavy Duty Vehicles Weighing 14,000 Pounds

This page is information for the proposed rule for the Modification of Federal On Board Diagnostic Regulations for Light-Duty Vehicles, Light-Duty Trucks, etc. Includes links to Federal Register and final rule.

Final Rule for Modification of Federal Onboard Diagnostic Regulations for: LD Vehicles, LD Trucks, MD Passenger Vehicles, Complete HD Vehicles and Engines Intended for Use in HD Vehicles Weighing 14,000 Pounds GVWR or Less

EPA is finalizing certain requirements associated with the Federal on-board diagnostic (OBD) system regulations.

Final Rule for Nonconformance Penalties for On-Highway Heavy-Duty Diesel Engines

EPA is taking final action to establish nonconformance penalties (NCPs) for manufacturers of heavy heavy-duty diesel engines (HHDDE) in model years 2012 and later for emissions of oxides of nitrogen (NOX) because we have found the criteria for NCPs.

Final Rule for Greenhouse Gas Emissions Standards and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles

EPA and National Highway Traffic Safety
Administration (NHTSA) are each finalizing rules to establish a comprehensive Heavy-Duty National Program that will reduce greenhouse gas emissions and fuel consumption for onroad heavy-duty vehicles.