| 22 November 1950 |
21 May 1952 |
Agreement on the Importation of Educational Scientific and Cultural Materials |
| 16 October 1953 |
|
International Agreement for the Regulation of the Production and Marketing of Sugar |
| 28 September 1955 |
1 August 1963 |
Protocol to amend the Convention for the Unification of Certain Rules relating to International Carriage by Air signed at Warsaw on 12 October 1929 |
| 3 October 1957 |
1 April 1959 |
Universal Postal Convention [together with Final Protocol, Detailed Regulations and Annexes, Provisions concerning Air Mail with their Final Protocol and Annexes] |
| 10 July 1964 |
1 January 1966 |
Agreement concerning Postal Parcels [with Final Protocol, Detailed Regulations and Final Protocol thereto] |
| 10 July 1964 |
1 January 1966 |
Constitution of the Universal Postal Union [with Final Protocol, General Regulations and Final Protocol thereto] |
| 10 July 1964 |
1 January 1966 |
Universal Postal Convention |
| 12 November 1965 |
1 January 1967 |
International Telecommunications Convention with Final Protocol, Additional Protocols I to III and Optional Additional Protocol (with Additional Protocol IV of 21 October 1965) |
| 15 November 1965 |
10 February 1969 |
Convention on the Service Abroad of Judicial and Extrajudicial Documents in Civil or Commercial Matters |
| 14 November 1969 |
1 July 1971 |
Additional Protocol to the Constitution of the Universal Postal Union (with Declarations, General Regulations, Final Protocol and Rules of Procedure of Congresses) |
| 14 November 1969 |
1 July 1971 |
Postal Parcels Agreement (with Final Protocol and Detailed Regulations] |
| 14 November 1969 |
1 July 1971 |
Insured Letters and Boxes Agreement [With Detailed Regulations] |
| 14 November 1969 |
1 July 1971 |
Universal Postal Convention (with Final Protocol and Detailed Regulations) |
| 14 November 1969 |
1 July 1971 |
Additional Protocol to the Constitution of the Universal Postal Union (with Declarations, General Regulations, Final Protocol and Rules of Procedure of Congresses) |
| 11 December 1969 |
11 December 1969 |
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 extending to certain overseas territories the Agreement of 26 November 1965 concerning the reciprocal granting of licences to amateur radio operators |