| 31 October 1920 |
|
Convention concerning the Organisation of Combat against Locusts |
| 21 April 1926 |
1 January 1927 |
Protocol regarding the International Convention of June 7, 1905, for the Creation of the International Institute of Agriculture |
| 9 December 1932 |
1 January 1934 |
Convention concerning International Telecommunications |
| 19 June 1933 |
15 January 1934 |
Convention Wireless Telegraphy (European Broadcasting frequencies) |
| 20 March 1934 |
|
Universal Postal Convention |
| 31 May 1937 |
|
International Agreement modifying the International Convention of June 21, 1920 for the establishment of an International Institute of Refrigeration |
|
18 March 2007 |
Convention on the Protection and Promotion of the Diversity of Cultural Expressions |