Exchange of Notes Between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of the United States of America Amending the Agreement Between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of the United States of America for Financing Certain Programmes of Educational and Cultural Exchanges : Signed at London on 10th May 1965, As Amended on 16th February 1967, 30th June 1971 and 11th September 1992