. /.   WORLD TRADE  
ORGANIZATION  G/TBT/N/USA/603 
10 December 2010  
 (10-6676) 
Committee on Technical Barriers to Trade Original:   English 
  
 
NOTIFICATION 
 
The following notification is being circ ulated in accordance with Article 10.6 
 
1. Member to Agreement notifying:  UNITED STATES
  
If applicable, name of local governme nt involved (Article 3.2 and 7.2):     
2. Agency responsible:  Environmental Protection Agency (EPA), National Highway 
Transportation Safety Administration (NHTSA),  Department of Tran sportation (DOT) (620) 
Name and address (including telephone and fax numbers, e-mail and website 
addresses, if available) of agency or authority designated to handle comments 
regarding the notification shall be indicated if different from above:     
3. Notified under Article 2.9.2 [X], 2.10.1 [   ], 5.6.2 [   ], 5.7.1 [   ], other:   
4. Products covered (HS or CCCN where applicable, otherwise national tariff heading. 
ICS numbers may be provided in addition, where applicable):  Emissions, fuel efficiency 
(ICS 13.020, 13.040, 43.080, 75.160) 
5. Title, number of pages and language(s) of the notified document:  Greenhouse Gas 
Emissions Standards and Fuel Efficiency St andards for Medium– and Heavy–Duty Engines 
and Vehicles (306 pages, in English). 
6. Description of content:  EPA and NHTSA, on behalf of the Department of Transportation, 
are each proposing rules to establish a comp rehensive Heavy–Duty National Program that 
will reduce greenhouse gas emissions and incr ease fuel efficiency for on–road heavy–duty 
vehicles, responding to the Presid ent's directive on 21 May 2010, to  take coordinated steps to 
produce a new generation of clean vehicles.  NHTSA's proposed fuel consumption standards 
and EPA's proposed carbon dioxide (CO2) emissi ons standards would be tailored to each of 
three regulatory categories of heavy–duty vehicles:  Combination Tractors; Heavy–Duty 
Pickup Trucks and Vans; and Voca tional Vehicles, as well as gasoline and diesel heavy–duty 
engines.  EPA's proposed hydrofluorocarbon emissions standards would apply to air 
conditioning systems in tractors , pickup trucks, and vans, and EPA's proposed nitrous oxide 
(N2O) and methane (CH4) emissions standard s would apply to all heavy–duty engines, 
pickup trucks, and vans.  EPA is also requ esting comment on possible alternative CO2–
equivalent approaches for mode l year 2012–14 light–duty vehicles. 
EPA's proposed greenhouse gas em ission standards under the Clean Air Act would begin with 
model year 2014.  NHTSA's proposed fuel consumption standards under the Energy 
Independence and Security Act of 2007 woul d be voluntary in model years 2014 and 2015, 
becoming mandatory with model year 2016 for most regulatory categories.  Commercial 
trailers would not be regulated in this phase of the He avy–Duty National Program, although 
there is a discussion of the possibili ty of future action for trailers. G/TBT/N/USA/603 
Page 2  
 
  7. Objective and rationale, including the na ture of urgent problems where applicable:  
Protection of the environment  
8. Relevant documents:   75 Federal Register (FR) 7415 1, 30 November 2010; 40 CFR Parts 
85, 86, 1036, 1037, 1065, 1066, and 1068 and Titl e 49 Code of Federal Regulations (CFR) 
Parts 523, 534 and 535.   
9. Proposed date of adoption:   
Proposed date of entry into force:   }To be determined 
10. Final date for comments:  31 January 2011 
11. Text available from: National enquiry point [X], or address, telephone and fax numbers, 
e-mail and web-site addresses, if available of the other body: 
http://edocket.access.gpo.gov/2010/2010-28120.htm  
http://edocket.access.gpo.gov/2010/pdf/2010-28120.pdf