. /.  WORLD TRADE  
ORGANIZATION   
G/TBT/N/USA/603/Add.1 
26 September 2011  
 (11-4620) 
Committee on Technical Barriers to Trade Original:   English 
  
 
NOTIFICATION  
 
Addendum 
  
 The following communication, dated 16 September 2011, is being circulated at the request of 
the delegation of the United States.  
 
_______________ 
  
TITLE:  Greenhouse Gas Emissions Standards and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles  AGENCY:  Environmental Protection Agency (EPA), National Highway Traffic Safety 
Administration (NHTSA), Department of Transportation (DOT) 
 
ACTION:  Final Rules  SUMMARY:  EPA and NHTSA, on behalf of the Depa rtment of Transportation, are each finalizing 
rules to establish a comprehensive Heavy-Duty National Program that will reduce greenhouse gas 
emissions and fuel consumption for on-road heav y-duty vehicles, responding to the President's 
directive on 21 May 2010, to take coordinated step s to produce a new generation of clean vehicles. 
NHTSA's final fuel consumption standa rds and EPA's final carbon dioxide (CO
2) emissions standards 
are tailored to each of three regulatory categori es of heavy-duty vehicles: Combination Tractors; 
Heavy-duty Pickup Trucks and Vans; and Vocational Vehicles. The rules include separate standards 
for the engines that power combination tractors and vocational vehicles. Certain rules are exclusive to 
the EPA program. These include EPA's final hydroflu orocarbon standards to control leakage from air 
conditioning systems in combination tractors, and pickup trucks and vans. These also include EPA's 
final nitrous oxide (N2O) and methane (CH 4) emissions standards that apply to all heavy-duty 
engines, pickup trucks and vans.  
 EPA's final greenhouse gas emission standards under the Clean Air Act will begin with model 
year 2014. NHTSA's final fuel consumption sta ndards under the Energy Independence and Security 
Act of 2007 will be voluntary in model years 2014 and 2015, becoming mandatory with model 
year 2016 for most regulatory categories. Commercial trailers are not regulated in this phase of the 
Heavy-Duty National Program. 
 
 The agencies estimate that the combined standards will reduce CO
2 emissions by 
approximately 270 million metric tons and save 530 m illion barrels of oil over the life of vehicles sold 
during the 2014 through 2018 model years, providing ove r $7 billion in net societal benefits, and $49 
billion in net societal benefits when private fuel savings are considered. 
 
 EPA is also finalizing provisions allowi ng light-duty vehicle manufacturers to use CO 2 credits 
to meet the light-duty vehicle N2O and CH 4 standards, technical amendments to the fuel economy G/TBT/N/USA/603/Add.1 
Page 2  
 
  provisions for light-duty vehicles, and a technical amendment to the criteria pollutant emissions 
requirements for certain switch locomotives.  DATES:  These final rules are effective on 13 Nove mber 2011. The incorporation by reference of 
certain publications listed in this re gulation is approved by the Director of the Federal Register as of 
14 November 2011. 
 FULL TEXT URL's:  http://www.gpo.gov/fdsys/pkg/FR-2011-09-15/html/2011-20740.htm  
http://www.gpo.gov/fdsys/pkg/FR -2011-09-15/pdf/2011-20740.pdf  
 
 
__________