| Country | Action | Action Date | Effective Date |
|---|
| BELGIUM | Ratification | 04/08/1937 | |
| BULGARIA | Ratification | 29/12/1949 | |
| CZECH REPUBLIC | Succession | 01/01/1993 | 01/01/1993 |
| CZECHOSLOVAKIA | Ratification | 19/09/1938 | |
| DJIBOUTI | Ratification | 03/08/1978 | |
| FRANCE | Ratification | 05/02/1938 | |
| FRANCE | Declaration | 27/11/1974 | |
| IRELAND, REPUBLIC OF | Ratification | 15/05/1939 | |
| MALTA | Ratification | 09/06/1988 | 09/06/1989 |
| MEXICO | Ratification | 09/03/1938 | |
| NORWAY | Ratification | 21/05/1935 | |
| PANAMA | Ratification | 19/06/1970 | |
| SLOVAK REPUBLIC | Succession | 01/01/1993 | 01/01/1993 |
| UNITED KINGDOM | Ratification | 13/01/1937 | |
| UNITED KINGDOM | Denunciation | 04/12/1958 | 04/12/1959 |
| URUGUAY | Ratification | 18/03/1954 | |