G/TBT/N/USA/1991/Add.1  
 
19 April 2024  
(24-3258) Page: 1/2 
Committee on Technical Barriers to Trade  Original: English  
 
 
NOTIFICATION  
Addendum  
The following communication , dated  19 April 2024, is being circulated at the request of the 
delegation of the United States of America . 
 
_______________  
 
 
Title:  Multi-Pollutant Emissions Standards for Model Years 2027 and Later Light -Duty and Medium -
Duty Vehicles  
 
Reason for Addendum:  
[ ] Comment period changed - date:   
[ ] Notified measure adopted - date:  
[X] Notified measure published - date: 18 April 2024  
[X] Notified measure enters into force - date: 17 June 2024  
[X] Text of final measure available from1:  
89 Federal Register (FR) 27842, Title 40 Code of Federal Regulations (CFR) Parts 85, 86, 
600, 1036, 1037, 1066, and 1068:  
https://www.govinfo.gov/content/pkg/FR -2024-04-18/html/2024 -06214.htm  
https://www.govinfo.gov/content/pkg/FR -2024-04-18/pdf/2024 -06214.pdf  
https://members.wto.org/crnattachments/2024/TBT/USA/final_measure/24_02697_00
_e.pdf  
[ ] Notified measure withdrawn or revoked - date:  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):   
[ ] Interpretive guidance issued and text available from1:  
[ ] Other:  
 
Description:  Under the Clean Air Act ( CAA), the Environmental Protection Agency (EPA) is 
establishing new, more protective emissions standards for criteria pollutants and greenhouse gases 
(GHG) for light -duty vehicles and Class 2b and 3 ("medium -duty") vehicles that will phase -in over 
model years 2027 through 2032. In addition, EPA is finalizing GHG program revisions in several 
areas, including off -cycle and air conditioning credits, the tr eatment of upstream emissions 
associated with zero -emission vehicles and plug -in hybrid electric vehicles in compliance 
calculations, medium -duty vehicle incentive multipliers, and vehicle certification and compliance. 
 
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/1991/Add.1  
 
- 2 - 
 
  EPA is also establishing new standard s to control refueling emissions from incomplete medium -duty 
vehicles, and battery durability and warranty requirements for light - duty and medium -duty electric 
and plug -in hybrid electric vehicles. EPA is also finalizing minor amendments to update program  
requirements related to aftermarket fuel conversions, importing vehicles and engines, evaporative 
emission test procedures, and test fuel specifications for measuring fuel economy.  
This final rule is effective on 17 June 2024. The incorporation by reference of certain publications 
listed in this regulation is approved by the Director of the Federal Register beginning 17 June 2024. 
The incorporation by reference of certain publications listed in this regulation is approved by the 
Director of the Federal Register as of 27 March 2023.  
Title 40  Code of Federal Regulations (CFR) Parts 85, 86, 600, 1036, 1037, 1066, and 1068 
This final rule and the proposed rule notified as G/TBT/N/USA/1991  are identified by Docket Number 
EPA-HQ-OAR-2022-0829. The Docket Folder is available on Regulations.gov at 
https://www.regulations.gov/docket/EPA -HQ-OAR-2022-0829/document  and provides access to 
primary and supporting documents as well as comments re ceived. Documents are also accessible 
from Regulations.gov  by searching the Docket Number.  
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