G/TBT/N/USA/1831/Add.1  
 
25 November 2022  
(22-8803) Page: 1/2 
Committee on Technical Barriers to Trade  Original: English  
 
NOTIFICATION  
Addendum  
The following communication , dated  24 November 2022, is being circulated at the request of the 
delegation of the United States of America . 
 
_______________  
 
 
Title:  Control of Air Pollution From  Aircraft Engines: Emission Standards and Test Procedures  
 
Reason for Addendum:  
[ ] Comment period changed - date:   
[ ] Notified measure adopted - date:  
[X] Notified measure published - date: 23 November 2022  
[X] Notified measure enters into force - date: 23 December 2022  
[X] Text of final measure available from1:  
https://www.govinfo.gov/content/pkg/FR -2022-11-23/htm l/2022 -25134.htm  
https://www.govinfo.gov/content/pkg/FR -2022-11-23/pdf/2022 -25134.pdf  
https://members.wto.org/crnattachments/2022/TBT/USA/final_measure/22_8056_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[ ] Notified measure withdrawn or revoked - date:  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:  TITLE: Control of Air Pollution From  Aircraft Engines: Emission Standards and Test 
Procedures  
AGENCY: Environmental Protection Agency (EPA)  
ACTION: Final rule  
SUMMARY: The Environmental Protection Agency (EPA)  is finalizing particulate matter (PM) emissio n 
standards and test procedures applicable to certain classes of engines used by civil subsonic jet 
airplanes (engines with rated output of greater than 26.7 kilonewtons (kN)) to replace the existing 
smoke standard for those engines. The EPA is adopting th ese standards under our authority in the 
Clean Air Act (CAA) . These standards and test procedures are equivalent to the engine standards 
adopted by the United Nations' International Civil Aviation Organization (ICAO)  in 2017 and 2020 
 
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/1831/Add.1  
 
- 2 - 
 
  and will apply to both new type design aircraft engines and in -production aircraft engines. The EPA, 
as well as the U.S. Federal Aviation Administration (FAA) , actively participated in the ICAO 
proceedings in which the ICAO requirements were developed. These standards reflect the 
importance of the control of PM emissions and U.S. efforts to secure the highest prac ticable degree 
of uniformity in aviation regulations and standards. Additionally, the EPA is migrating, modernizing, 
and streamlining the existing regulations into a new part in the Code of Federal Regulations. As part 
of this update, the EPA is also align ing with ICAO by applying the smoke number standards to 
engines less than or equal to 26.7 kilonewtons rated output used on supersonic airplanes.  
DATES: This final rule is effective on 23 December 2022. The incorporation by reference of certain 
material li sted in this rule is approved by the Director of the Federal Register as of 23 December 
2022.  
This final rule and the proposed rule notified as G/TBT/N/USA/1831  are identified by Docket Number 
EPA-HQ-OAR-2019-0660. The Docket Folder is available on Regulations.gov at 
https://www.regulations.gov/docket/EPA -HQ-OAR-2019-0660/document  and provides access to 
primary and supporting documents as well as comments received. Documents are also accessible 
from Regulations.gov  by searching the Docket Number.  
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