| 3 November 1906 |
|
Additional Agreement to the International Radiotelegraphic Convention |
| 13 November 1908 |
|
International Convention relative to the Protection of Literary and Artistic Works, revising that signed at Berne, September 9, 1886, |
| 4 May 1910 |
8 August 1912 |
International Convention for the Suppression of the White Slave Traffic |
| 30 November 1920 |
|
Universal Postal Convention (Revision of Convention of May 26, 1906) |
| 2 February 1922 |
2 May 1922 |
Convention between the United Kingdom and France respecting Legal Proceedings on Civil and Commercial Matters |
| 28 June 1929 |
|
Postal Union Agreement regarding Insured Letters and Boxes |
| 23 May 1939 |
1 July 1940 |
Universal Postal Convention, with Final Protocol, Regulations of Execution and Provisions concerning the Transportation of Regular Mails by Air, with Final Protocol. |
| 23 May 1939 |
|
Convention and Final Protocol regarding the Universal Postal Union (with Regulations and Airmail Provisions) |
| 2 October 1947 |
1 January 1949 |
International Convention on Telecommunications [With Annexes, Final Protocol of Signature and Additional Protocols] |