G/TBT/N/USA/2058/Add.1  
 
30 November 2023  
(23-8115) Page: 1/2 
Committee on Technical Barriers to Trade  Original: English  
 
NOTIFICATION  
Addendum  
The following communication , dated  29 November 2023, is being circulated at the request of the 
delegation of the United States of America . 
 
_______________  
 
 
Title:  Inclusion of Additional Automatic Dependent Surveillance - Broadcast (ADS -B) Out Technical 
Standard Orders; Incorporation by Reference  
 
Reason for Addendum:  
[ ] Comment period changed - date:   
[ ] Notified measure adopted - date:  
[X] Notified measure published - date: 28 November 2023  
[X] Notified measure enters into force - date: 18 December 2023  
[X] Text of final measure available from1:  
88 Federal Register (FR) 83022, 14 Code of Federal Regulations (CFR) Parts 43 and 91:  
https://www.govinfo.gov/content/pkg/FR -2023-11-28/html/2023 -26145.htm  
https://www.govinfo.gov/content/pkg/FR -2023-11-28/pdf/2023 -26145.pdf  
https://members.wto.org/crnattachments/2023/TBT/USA/final_measure/23_13871_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[ ] Notified measure withdrawn or revoked - date:  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:  This action confirms the 18 December 2023, effective date of the "Inclusion of 
Additional Automatic Dependent Surveillance -Broadcast (ADS -B) Out Technical Standard Orders; 
Incorporation by Reference" direct final rule published on 17 October 2023. The dire ct final rule 
amends the Automatic Dependent Surveillance -Broadcast (ADS - B) Out requirements to allow 
aircraft meeting the performance requirements in Technical Standard Order (TSO) -C166c (Extended 
Squitter Automatic Dependent Surveillance --Broadcast (ADS -B) and Traffic Information Service --
Broadcast (TIS -B) Equipment Operating on the Radio Frequency of 1090 Megahertz (MHz)), or TSO -
C154d, (Universal Access Transceiver (UAT) ADS -B Equipment Operating on the Radio Frequency of 
 
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/2058/Add.1  
 
- 2 - 
 
  978 Megahertz (MHz)) to meet t he regulations. Aircraft equipped with ADS -B Out that meets the 
performance requirements of either TSO -C166c or TSO -C154d will provide additional information to 
pilots and air traffic control, including weather information, spectrum monitoring, and airspee d. They 
will also enable new wake turbulence applications, enhance weather forecasting, and enable or 
enhance ADS -B In applications such as Flight Interval Management.  
The effective date of 18 December 2023, for the direct final rule published 17 October 2 023 ( 88 FR 
71468 ) is confirmed.  
Incorporation by reference: The incorporation by reference of certain publications listed in this rule 
is approved by the Director of the Office of the Federal Register as of 18 December 2023. The 
incorporation by reference of certain other publications listed in this rule was approved by the 
Director of the Office of the Federal Register as of 11 Augu st 2010.  
Title 14  Code of Federal Regulations (CFR) Parts 43 and 91 
This direct final rule; confirmation of effective date and the direct final rule; request for comments 
notified as G/TBT/N/USA/2058  are identified by Docket Number FAA -2023-1836. The Docket Folder 
is available on Regulations.gov at https://www.regulations.gov/docket/FAA -2023-1836/document  
and provides access to primary documents as well as comments received. Documents are also 
accessible  from Regulations.gov  by searching the Docket Number.  
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