. /.   WORLD TRADE  
ORGANIZATION  G/TBT/N/USA/238 
29 January 2007 
 (07-0384) 
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 government involved (Articles 3.2 and 7.2):         
2. Agency responsible:   Environmental Protection Agency (EPA) (245) 
Name and address (including telephone and fax numbers, e-mail and web-site 
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):   Motor Vehicles   
(HS:  8703, 8704;  ICS:  43, 13) 
5. Title, number of pages and language(s) of the notified document:   Control of Air 
Pollution From New Motor Vehicles and Ne w Motor Vehicle Engines - Heavy-Duty 
Vehicle and Engine Standards; Onboard Diagnostic Requirements; Proposed Rule  
(146 pages, in English). 
6. Description of content:   In 2001, EPA finalized a new, major program for highway heavy-
duty engines.  That program, the Clean Diesel Trucks and Buses program, will result in the introduction of advanced emissions control systems such as catalyzed diesel particulate filters (DPF) and catalysts capable of reduc ing harmful nitrogen oxide (NOX) emissions. 
This proposal would require that these advan ced emissions control systems be monitored 
for malfunctions via an onboard diagnostic sy stem (OBD), similar to those systems that 
have been required on passenger cars since th e mid-1990s.  This proposal would require 
manufacturers to install OBD systems that monitor the functioning of emission control components and alert the vehicle operator to an y detected need for emission related repair. 
This proposal would also require that manufactur ers make available to the service and repair 
industry information necessary to perform re pair and maintenance service on OBD systems 
and other emission related engine com ponents and revise certain existing OBD 
requirements for diesel engines used in heavy-duty vehicles under 14,000 pounds. 
7. Objective and rationale, including the na ture of urgent problems where applicable:  
Protection of human life and health 
8. Relevant documents:   72 Federal Register (FR) 3199 24  January 2007;  Title 40 Code of 
Federal Regulations (CFR) Part 86.  Will a ppear in the Federal Register when adopted. G/TBT/N/USA/238 
Page 2  
 
  9. Proposed date of adoption:   
Proposed date of entry into force:   }To be determined 
10. Final date for comments:   26 March 2007 
11. Texts available from:  National enquiry point [  X ] or address, telephone and fax 
numbers, e-mail and web-site addresses, if available of the other body:   
Internet URLs: 
 
http://a257.g.akamaitech.net/7/257/24 22/01jan20071800/edocket.access.gpo.gov/2007/07-
110.htm 
http://a257.g.akamaitech.net/7/257/24 22/01jan20071800/edocket.access.gpo.gov/2007/pdf/
07-110.pdf