| 9 December 1907 |
15 November 1908 |
International Agreement respecting the Creation of an International Office of Public Health |
| 28 June 1919 |
10 January 1920 |
Treaty of Peace between the Allied and Associated Powers and Germany |
| 10 September 1919 |
|
Convention for the control of the Trade in Arms and Ammunition |
| 27 November 1919 |
|
Treaty of Peace between the Allied and Associated Powers and Bulgaria, and Protocol. |
| 9 February 1920 |
|
Treaty regulating the Status of Spitsbergen and Conferring the Sovereignty on Norway |
| 28 August 1924 |
1 October 1925 |
Convention and Protocol revising Universal Postal Convention of November 30, 1920 |
| 21 June 1926 |
31 May 1928 |
International Sanitary Convention (1926) |
| 27 August 1928 |
24 July 1929 |
International Treaty for the Renunciation of War as an Instrument of National Policy |
| 28 June 1929 |
|
Universal Postal Convention |
| 28 June 1929 |
|
Postal Union Agreement regarding Parcel Post |
| 28 June 1929 |
|
Postal Union Agreement regarding Insured Letters and Boxes |
| 13 July 1931 |
9 July 1933 |
International Convention for Limiting the Manufacture and Regulating the Distribution of Narcotic Drugs with Protocol of Signature |