   
  
G/TBT/N/USA/2036/Add.3  
 
5 January 2024  
(24-0143) Page: 1/2 
Committee on Technical Barriers to Trade  Original: English  
 
 
NOTIFICATION  
Addendum  
The following communication , dated  5 January 2024, is being circulated at the request of the 
delegation of the United States of America . 
 
_______________  
 
 
Title:  Proposed Amendments to the Heavy -Duty Engine and Vehicle Omnibus Regulation  
 
Reason for Addendum:  
[ ] Comment period changed - date:   
[ ] Notified measure adopted - date:  
[ ] Notified measure published - date:  
[ ] Notified measure enters into force - date:  
[ ] Text of final measure available from1:  
[ ] Notified measure withdrawn or revoked - date:  
Relevant symbol if measure re -notified:   
[ ] Content or scope of notified measure changed  and text available from1:  
New deadline for comments (if applicable):   
[X] Interpretive guidance issued and text available from1:  
Guidance Documents Available for the Heavy -Duty Engine and Vehicle Omnibus Regulation  
Heavy -Duty Low NOx Resources:  
https://ww2.arb.ca.gov/our -work/programs/heavy -duty-low-nox/resources  
[ ] Other:  
 
Description:  The California Air Resources Board (CARB) has posted new guidance documents for 
manufacturers, dealers, upfitters, and buyers to clarify when a heavy -duty engine must be 
California -certified and subject to the California Averaging, Banking and  Trading program 
requirements (fully offset) under Title 13, California Code of Regulations, Sections 1956.8(b) and 
2015(r). These guidance documents provide additional information to assist stakeholders in planning 
efforts to comply with the Heavy -Duty En gine and Vehicle Omnibus (Omnibus) regulation:  
1. Clarifications for California Truck Dealers Regarding Sales Outside Californi a 
2. CARB Responses Regarding Requests for Enforcement Discretion for Advanced Clean Fleets 
and Omnibus Regulations  
 
1 This information can be provided by including a website address, a pdf attachment, or other 
information on where the text of the final /modified  measure and/or interpretive guidance can be obtained.  G/TBT/N/USA/2036/Add.3  
 
- 2 - 
 
  While these documents are intended to help with compliance efforts, it is the sole responsibility of 
each regulated entity to ensure compliance with the Omnibus regulation.  
In July 2023, CARB announce d a Clean Truck Partnership with the nation's leading truck 
manufacturers and the Truck and Engine Manufacturers Association. CARB has created a website to 
track the status and outcome of commitments made as part of that partnership: Clean Truck 
Partnership Commitments . 
In August 2023, CARB staff proposed amendments to the Omnibus regulation to provide additional 
compliance flexibilities in the 2024 through 2026 model year timeframe, while maintaining the 
emissions benefits of the Omnibus regulation. CARB's Executive Officer signed Executive Order R -
23-006 of the Omnibus Amendments Regulation , approving the proposed amendments, on 28 
December 2023.  
__________  
 
 