G/TBT/N/USA/1640/Add.2  
 
13 January 2021  
(21-0420) Page: 1/2 
Committee on Technical Barriers to Trade  Original: English  
 
NOTIFICATION  
Addendum  
The following communication , dated  12 January 2021 , is being circulated at the request of the 
delegation of the United States of America . 
 
_______________  
 
 
Title: Control of Air Pollution From Airplanes and Airplane Engines: GHG Emission Standards and 
Test Procedures  
 
Reason for Addendum:  
[  ] Comment period changed - date:   
[  ] Notified measure adopted - date:  
[X] Notified measure published - date: 11 January 2021  
[X] Notified measure enters into force - date: 11 January 2021  
[X] Text of final measure available from1:  
https://www.govinfo.gov/content/pkg/FR -2021-01-11/html/2020 -28882. htm 
https://www.govinfo.gov/content/pkg/FR -2021-01-11/pdf/2020 -28882.pdf  
https://members.wto.org/crnattachments/2021/TBT/USA/final_measure/21_0362_00_
e.pdf 
[  ] Notified measure withdrawn or revoked - date:  
Relevant symbol if meas ure re -notified:   
[  ] Content or scope of notified measure changed  
New deadline for comments (if applicable):   
[  ] Interpretive guidance issued and text available from1:  
[  ] Other:  
 
Description:  Control of Air Pollution From Airplanes and Airplane Engines: GHG Emission Standards 
and Test Procedures  
AGENCY: Environmental Protection Agency (EPA)  
ACTION: Final rule  
SUMMARY: The Environmental Protection Agency (EPA) is adopting greenhouse gas (GHG) e mission 
standards applicable to certain classes of engines used by certain civil subsonic jet airplanes with a 
maximum takeoff mass greater than 5,700 kilograms and by certain civil larger subsonic propeller -
driven airplanes with turboprop engines having a  maximum takeoff mass greater than 
8,618  kilograms. These standards are equivalent to the airplane carbon dioxide (CO2) standards 
 
1 This information can be provided by including a website address, a pdf attachment, or other 
information on where the text of the final measure and/or interpretive guidance can be obtained.  G/TBT/N/USA/1640/Add.2  
 
- 2 - 
 
  adopted by the International Civil Aviation Organization (ICAO) in 2017 and apply to both new type 
design airplanes and in -production airplanes. The standards in this rule reflect U.S. efforts to secure 
the highest practicable degree of international uniformity in aviation regulations and standards. The 
standards also meet the EPA's obligation under section 231 of the Clean Air A ct (CAA) to adopt GHG 
standards for certain classes of airplanes as a result of the 2016 "Finding That Greenhouse Gas 
Emissions From Aircraft Cause or Contribute to Air Pollution That May Reasonably Be Anticipated To 
Endanger Public Health and Welfare" (he reinafter "2016 Findings") --for six well -mixed GHGs emitted 
by certain classes of airplane engines. Airplane engines emit only two of the six well -mixed GHGs, 
CO2 and nitrous oxide (N2O). Accordingly, EPA is adopting the fuel -efficiency -based metric 
establ ished by ICAO, which will control both the GHGs emitted by airplane engines, CO2 and N2O.  
DATES: This final rule is effective on 11 January 2021. The incorporation by reference of certain 
publications listed in this regulation is approved by the Director of the Federal Register as of 
11 January 2021.  
This final rule and previous actions notified under the symbol G/TBT/N/USA/1640  are identified by 
Docket Number EPA -HQ-OAR-2018-0276. The Docket Folder is available on Regulations.gov  at 
https://www.regulations.gov/docket?D=EPA -HQ-OAR-2018-0276 and provides access to primary 
and suppo rting documents as well as comments received. Documents are also accessible from 
Regulations.gov  by searching the Docket Number.  
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