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Regulatory Development and Retrospective Review Tracker

Control of Air Pollution From Motor Vehicles: Tier 3 Motor Vehicle Emission and Fuel Standards

a.k.a. Tier 3 Vehicle/Fuel Standards

RIN: 2060-AQ86 (What's this?)

Docket No.: EPA-HQ-OAR-2011-0135 (What's this?)

Current Phase: Proposal (What's this?)

This action would establish more stringent vehicle emissions standards and reduce the sulfur content of gasoline as part of a systems approach to addressing the impacts of motor vehicles and fuels on air quality and public health.

The rule would result in significant reductions in pollutants such as ozone, particulate matter, and air toxics across the country and help state and local agencies in their efforts to attain and maintain health-based National Ambient Air Quality Standards. These proposed vehicle standards are intended to harmonize with California's Low Emission Vehicle program, thus creating a federal vehicle emissions program that would allow automakers to sell the same vehicles in all 50 states. The vehicle standards would also coordinate with the light-duty vehicle greenhouse gas standards for model years 2017-2025, creating a nationwide alignment of vehicle programs for criteria pollutant and greenhouse gases.

NPRM: Sent to OMB for Regulatory Review01/29/2013
NPRM: Received by OMB01/29/2013
NPRM: Regulatory Review Concluded03/29/2013
NPRM: Public Meeting04/24/2013
NPRM: Public Meeting04/29/2013
NPRM: Published in FR05/21/2013
NPRM: Comment Period Open05/21/2013
NPRM: Comment Period Extension Published in FR05/29/2013
NPRM: Comment Period Closed06/13/2013
NPRM: Comment Period Closed with Extension07/01/2013
Final Rule: Sent to OMB for Regulatory Review01/24/2014
Final Rule: Received by OMB01/24/2014
Final Rule: Regulatory Review Concluded03/03/2014
Final Rule: Published in FR04/2014 (projected)

Potential Effects

Children's Health
This rule is likely to address an adverse impact on childhood lifestages, including prenatal (via exposure to women of childbearing age). The potential adverse impacts are expected to be due to toxicity (i.e., the developing fetus, infants, and/or children are more likely to have an adverse response than adult lifestages).

Environmental Justice
This rulemaking involves a topic that is likely to be of particular interest to or have particular impact upon minority, low-income, tribal, and/or other vulnerable populations because:

  • This topic is likely to impact the health of vulnerable populations.
  • This topic is likely to impact the environmental conditions of vulnerable populations.
  • This topic is likely to present an opportunity to address an existing disproportionate impact on vulnerable populations.

Small Entities
EPA notifies the public when a rulemaking is likely to 1) have any adverse economic impact on small entities even though a Regulatory Flexibility Analysis may not be required and/or 2) have significant adverse economic impacts on a substantial number of small entities. The term "small entities" includes small businesses, small governments, and small not-for-profits. (Read a longer explanation on our Small Entities web page.) This rulemaking is likely to impact small entities in the following way(s):
  • Likely to have any adverse economic impact on:
    • small businesses
  • Likely to have a significant adverse economic impact on a substantial number of these small entities:
    • small businesses

Unfunded Mandates
This action may place unfunded mandates on the private sector and is subject to Section 202 of the Unfunded Mandates Reform Act.

Participate / Learn More Regulatory Review

Some of EPA's rulemakings undergo regulatory review (What's this?), as prescribed by Executive Order 12866 and coordinated by the Office of Management and Budget (OMB). The following list describes which of this rulemaking's stages have completed review and published in the Federal Register, if any, and provides links to the review documents where available. Consult the "Timeline" section of this Web page for the dates of each review.

  • NPRM - No Information Available.
  • Final Rule - This stage of the rulemaking underwent review.
Citations & Authorities

Federal Register Citations

Code of Federal Regulations (CFR) Citation
40 CFR 80;40 CFR 86;40 CFR 85;40 CFR 600;40 CFR 1036;40 CFR 1037;40 CFR 1065;40 CFR 1066

Legal Authority
Clean Air Act Section 202(a);Clean Air Act Section 202(k);Clean Air Act Section 211(c)


This site provides summaries of priority rulemakings and priority retrospective reviews of existing regulations. We update most of the site at the beginning of each month, though some data is updated more frequently if it is time sensitive. The information on this site is not intended to and does not commit EPA to specific conclusions or actions. For example, after further analysis, EPA may decide the effects of a rule would be different or it may decide to terminate a rulemaking.

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