| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| BELGIUM | Signature | 30/03/1931 | |
| BELGIUM | Ratification | 09/11/1932 | |
| BULGARIA | Accession | 05/03/1932 | 09/05/1933 |
| Ceylon | Extension | 03/01/1935 | |
| Cyprus | Extension | 03/01/1935 | |
| Cyprus | Denunciation | 14/01/1963 | |
| CZECHOSLOVAKIA | Signature | 30/03/1931 | |
| DANZIG | Signature | 30/03/1931 | |
| DENMARK | Signature | 30/03/1931 | |
| DENMARK | Ratification | 04/12/1931 | |
| EGYPT | Accession | 20/05/1939 | |
| FINLAND | Accession | 23/05/1934 | |
| FINLAND | Denunciation | 10/09/1956 | |
| Gold Coast | Extension | 03/01/1935 | |
| Gold Coast | Denunciation | 14/01/1963 | |
| GREECE | Accession | 06/06/1939 | |
| Hong Kong | Extension | 03/01/1935 | |
| Hong Kong | Denunciation | 14/01/1963 | |
| IRAQ | Accession | 20/09/1938 | |
| IRELAND, REPUBLIC OF | Denunciation | 18/03/1963 | |
| Irish Free State | Extension | 27/11/1933 | |
| Irish Free State | Denunciation | 18/03/1963 | |
| ITALY | Signature | 30/03/1931 | |
| ITALY | Ratification | 25/09/1933 | |
| Jamaica | Extension | 03/01/1935 | |
| Kenya | Extension | 03/05/1938 | |
| LATVIA | Accession | 10/01/1939 | |
| LUXEMBOURG | Signature | 30/03/1931 | |
| LUXEMBOURG | Ratification | 31/03/1933 | |
| LUXEMBOURG | Denunciation | 02/06/1965 | |
| Malay States, Federated | Extension | 06/11/1937 | |
| Malay States, Unfederated | Extension | 06/11/1937 | |
| Malta | Extension | 03/01/1935 | |
| NETHERLANDS THE | Signature | 30/03/1933 | |
| NETHERLANDS THE | Ratification | 16/01/1934 | |
| NETHERLANDS THE | Denunciation | 01/03/1960 | |
| NETHERLANDS THE | Declaration | 01/01/1986 | |
| Newfoundland (UK) | Extension | 09/01/1933 | 09/07/1933 |
| Newfoundland (UK) | Denunciation | 14/01/1963 | |
| Nigeria | Extension | 11/03/1936 | |
| Northern Rhodesia | Extension | 03/05/1938 | |
| Nyasaland | Extension | 03/05/1938 | |
| Palestine | Extension | 29/04/1936 | |
| POLAND | Signature | 30/03/1931 | |
| POLAND | Ratification | 15/06/1934 | |
| POLAND | Denunciation | 26/05/1971 | |
| PORTUGAL | Signature | 30/03/1931 | |
| PORTUGAL | Ratification | 23/01/1932 | |
| PORTUGAL | Declaration | 23/01/1932 | |
| ROUMANIA | Accession | 19/06/1935 | |
| ROUMANIA | Denunciation | 10/07/1967 | |
| Sierra Leone | Extension | 11/03/1936 | |
| Southern Rhodesia | Extension | 06/08/1932 | 09/05/1933 |
| Southern Rhodesia | Denunciation | 14/01/1963 | |
| SOVIET UNION | Accession | 23/07/1935 | |
| SPAIN | Signature | 30/03/1931 | |
| Straits Settlements | Extension | 06/11/1937 | |
| SWEDEN | Signature | 30/03/1931 | |
| SWEDEN | Ratification | 09/11/1933 | |
| SWITZERLAND | Signature | 30/03/1931 | |
| SWITZERLAND | Ratification | 19/10/1934 | |
| SWITZERLAND | Reservation | 19/10/1934 | |
| Tanganyika | Extension | 03/05/1938 | |
| Trinidad | Extension | 21/05/1940 | |
| TURKEY | Signature | 30/03/1931 | |
| TURKEY | Ratification | 25/09/1936 | |
| Uganda | Extension | 03/05/1938 | |
| UNITED KINGDOM | Signature | 30/03/1931 | |
| UNITED KINGDOM | Ratification | 20/04/1932 | |
| UNITED KINGDOM | Declaration | 06/08/1932 | |
| UNITED KINGDOM | Declaration | 09/01/1933 | |
| UNITED KINGDOM | Declaration | 27/11/1933 | |
| UNITED KINGDOM | Declaration | 03/01/1935 | |
| UNITED KINGDOM | Declaration | 11/03/1936 | |
| UNITED KINGDOM | Declaration | 29/04/1936 | |
| UNITED KINGDOM | Declaration | 06/11/1937 | |
| UNITED KINGDOM | Declaration | 03/05/1938 | |
| UNITED KINGDOM | Declaration | 21/05/1940 | |
| UNITED KINGDOM | Denunciation | 14/01/1963 | |
| Windward Islands | Extension | 03/01/1935 | |
| YUGOSLAVIA | Accession | 09/05/1933 | |
| Zanzibar | Extension | 03/05/1938 | |
| ZIMBABWE | Succession | 01/12/1998 | 18/04/1980 |