| 15 June 1897 |
|
Universal Postal Convention |
| 26 September 1906 |
|
International Convention respecting the Prohibition of the Use of White (Yellow) Phosphorus in the Manufacture of Matches |
| 3 November 1906 |
|
Additional Agreement to the International Radiotelegraphic Convention |
| 9 December 1907 |
15 November 1908 |
International Agreement respecting the Creation of an International Office of Public Health |
| 13 October 1919 |
|
Convention for the Regulation of Aerial Navigation |
| 27 October 1922 |
14 December 1926 |
Protocol Amending Article 5 of the Convention for the Regulation of Aerial Navigation of October 13, 1919. |
| 30 June 1923 |
14 December 1926 |
Protocol Amending Article 34 of the Convention for the Regulation of Aerial Navigation of October 13, 1919. |
| 24 September 1923 |
28 July 1924 |
Protocol on Arbitration Clauses |
| 3 November 1923 |
27 November 1924 |
International Convention relating to the Simplification of Customs Formalities and Protocol of Signature |
| 17 June 1925 |
8 February 1928 |
Protocol for the Prohibition of the Use in War of Asphyxiating, Poisonous or other Gases, and of Bacteriological Methods of Warfare |
| 25 September 1926 |
9 March 1927 |
International Convention with object of Securing the Abolition of Slavery and the Slave Trade |
| 26 September 1928 |
16 August 1929 |
General Act for the Pacific Settlement of International Disputes |
| 7 April 1930 |
|
Exchange of Notes between His Majesty's Government in the United Kingdom and the Government of India and the Netherlands Government respecting Air Mail Services to the East Indies and Australia |
| 28 June 1930 |
1 May 1932 |
Convention concerning Forced or Compulsory Labour (ILO Convention No.29) |