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TREATIES AND OTHER INTERNATIONAL ACTS SERIES 21-929 

DEFENSE 

Agreement Between the 

UNITED STATES OF AMERICA 

and the UNITED KINGDOM OF 

GREAT BRITAIN AND NORTHERN 

IRELAND

Extending the Agreement of 

June 6, 2016 

Effected by Exchange of Notes at Washington 

September 28 and 29, 2021 

Entered into force September 29, 2021 
NOTE BY THE DEPARTMENT OF STATE 

Pursuant to Public Law 89—497, approved July 8, 1966 

(80 Stat. 271; 1 U.S.C. 113)—

“. . .the Treaties and Other International Acts Series issued

under the authority of the Secretary of State shall be competent 

evidence . . . of the treaties, international agreements other than 

treaties, and proclamations by the President of such treaties and 

international agreements other than treaties, as the case may be, 

therein contained, in all the courts of law and equity and of maritime 

jurisdiction, and in all the tribunals and public offices of the 

United States, and of the several States, without any further proof 

or authentication thereof.”
The Department of State of the United States of America has the honor to 

refer the Embassy of the United Kingdom of Great Britain and Northern Ireland to 

the Agreement Between the Government of the United States of America and the 

Government of the United Kingdom of Great Britain and Northern Ireland 

Concerning the Use of Wideawake Airfield on Ascension Island by Civil Aircraft, 

effected by exchange of notes at Washington, June 6, 2016, with Attachment and 

Annex, and entered into force on that date, with effect from September 30, 2014 

(the "Agreement"). 

The Government of the United States proposes that the Agreement shall 

continue in force for a period of one additional year from September 30, 2021, to 

September 30, 2022. 

If the Government of the United Kingdom accepts this proposal, the 

Department of State further proposes that this note and the British Embassy's 

affirmative note in reply shall constitute an agreement between the two 

governments, which shall enter into force on the date of the reply. 

Department of State, 

Washington, September 28, 2021. 

DIPLOMATIC NOTE 
British Embassy Note No:- 069/2021 

The Embassy of the United Kingdom of Great Britain and Northern Ireland 

presents its compliments to the United States Department of State and has the 

honour to acknowledge receipt of the Department's Note, dated 28 September 

2021, proposing an agreement to extend the Agreement Between the Government 

of the United States of America and the Government of the United Kingdom of 

Great Britain and Northern Ireland Concerning the Use ofWideawake Airfield on 

Ascension Island by Civil Aircraft, effected by exchange of notes at Washington 

June 6, 2016, with Attachment and Annex, and entered into force on that date, with 

effect from September 30, 2014 (the "Agreement"), which reads as follows: 

"The Department of State of the United States of America has the honor to 

refer the Embassy of the United Kingdom of Great Britain and Northern 

Ireland to the Agreement Between the Government of the United States of 

America and the Government of the United Kingdom Concerning the Use of 

Wideawake Airfield on Ascension Island by Civil Aircraft, effected by an 

exchange of notes at Washington, June 6, 2016, with Attachment and 
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Annex, and entered into force on that date, with effect from September 30, 

2014 (the "Agreement"). 

The Government of the United States proposes that the Agreement shall 

continue in force for a period of one additional year from September 30, 

2021, to September 30, 2022. 

If the Government of the United Kingdom accepts this proposal, the 

Department of State further proposes that this note and the British 

Embassy's affirmative note in reply shall constitute an agreement between 

the two governments, which shall enter into force on the date of the reply." 

The Embassy has the honor to confirm that the abovementioned proposal is 

acceptable to the Government of the United Kingdom of Great Britain and 

Northern Ireland and that the Department's Note, and this Note in reply shall 

together constitute an agreement between the two Governments, which shall enter 

into force on the date of this Note. 
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The Embassy of the United Kingdom of Great Britain and Northern Ireland 

avails itself of this opportunity to renew to the United States Department of State 

the assurances of its highest consideration. 

Washington, D.C. 

29 September 2021