.  WORLD TRADE  
ORGANIZATION  G/TBT/N/USA/198 
4 July 2006 
 (06-3219) 
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:   State of California (205) 
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:    
Clerk of the Board,  
Air Resources Board, 
1001 I Street,  Sacramento,  California 95814 
Fax:  (+916) 322-3928 
Website: http://www.arb.ca.gov/lispub/comm/bclist.php 
3. Notified under Article 2.9.2 [    ], 2.10.1 [   ], 5.6.2 [   ], 5.7.1 [   ], other:   3.2 
4. Products covered (HS or CCCN where applicable, otherwise national tariff heading. 
ICS numbers may be provided in  addition, where applicable):   Motor vehicles  
(HS:  Chapter 8703) (ICS:  13, 43, 53) 
5. Title, number of pages and language(s) of the notified document:   Requirements to 
Reduce Idling Emissions from New a nd In-Use Trucks, Beginning in 2008 
(55 pages, English) 
6. Description of content:    
1. At its 20 October 2005 public hearing, th e Air Resources Board (the Board or ARB) 
approved amendments to title 13, Californi a Code of Regulations (CCR) sections 
1956.8, 2404, 2424, 2425, and 2485, and the incorporated “California Exhaust Emission 
Standards and Test Procedures for 2004 an d Subsequent Model Heavy-Duty Diesel 
Engines.”  The approved amendments to the re gulations and test procedures establish idling 
reduction requirements for new heavy-duty di esel engines and in-use sleeper berth equipped 
trucks and emission performance requirements fo r technologies used as alternatives to main 
engine idling.  At the hearing, the Board a dopted Resolution 05-55, in which it approved the 
originally proposed amendments with several modifications. Some of the modifications had 
been suggested by staff in a document entitle d “Staff’s Suggested Modifications to the 
Original Proposal” that was distributed at  the hearing and was Attachment C to the 
Resolution.  Other modifications were suggest ed by commenters and approved by the Board 
during the hearing:  G/TBT/N/USA/198 
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(a) technologies utilizing electrical shore power or comparably clean emission 
technologies would be allowed as options to comply with the in-use idling regulations set forth in section 2485  of title 13, California Code of 
Regulations,  
(b) military tactical vehicles would be exempted from the proposed 
amendments to sections 1956.8, 2404,  2424, 2425 of title 13, California 
Code of Regulations; and  
(c) the current exemption applicable to military tactical vehicles in section 
2485 of title 13, California Code of Regul ations would be clarified to also 
exempt operational modes such as training, testing, and deployment.  The 
Resolution and its Attachment C are available at ARB’s Internet web page for this rulemaking: http://www.arb.ca.gov/regact/hdvidle/hdvidle.htm. The Resolution directed the Execu tive Officer to incorporate the 
modifications into the proposed regulatory text, with such other conforming 
modifications and technical amendmen ts as may be appropriate, and to 
make the modified text available for a supplemental comment period of at least 15 days. 
2. Subsequent to the hearing, the staff has identified a number of additional, primarily 
technical modifications that are appropriate to make the amended regulations work as 
effectively as possible. The most significant post-hearing modifications are: 
 
(a) allowing the engine shutdown system  to be overridden during exhaust 
emission control device regeneration or maintenance periods, or if servicing 
or maintenance of the engine requires extended idling;  
(b) clarifying that the engine shutdown system requirements do not apply to 
emergency vehicles or to medium-duty vehicles; 
(c) clarifying in the test procedures portion of the rulemaking that for 
compliance with the optional NOx idling standard, the average NOx emissions of each mode of the supplemental NOx idling test procedure should not exceed the optional NOx standard; and  
(d) modifying the definition of auxiliary power system (APS) in the ATCM 
portion of the rulemaking to extend the availability of compliant APSs as a 
compliance alternative to buses and other non-truck commercial vehicles. 
7. Objective and rationale, including the natu re of urgent problems where applicable:  
Protection of the environment 
8. Relevant documents:   See item 11 below 
9. Proposed date of adoption:   
Proposed date of entry into force:   }To be determined 
10. Final date for comments:   13 July 2006  G/TBT/N/USA/198 
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  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:   
Text and relevant documents ava ilable online at Internet URL: 
http://www.arb.ca.gov/regact/hdvidle/hdvidle.htm