| Country | Action | Action Date | Effective Date |
|---|
| Antilles | Extension | 01/01/1986 | |
| Aruba | Extension | 01/01/1986 | |
| Australia | Extension | 03/09/1938 | |
| AUSTRIA | Signature | 07/06/1930 | |
| AUSTRIA | Ratification | 31/08/1932 | |
| Bahamas | Extension | 07/09/1938 | |
| BAHAMAS | Succession | 19/05/1976 | |
| Barbados | Extension | 18/07/1936 | |
| Basutoland | Extension | 18/07/1936 | |
| Bechuanaland | Extension | 18/07/1936 | |
| BELARUS | Succession | 04/02/1998 | 25/12/1991 |
| BELGIUM | Signature | 07/06/1930 | |
| BELGIUM | Ratification | 31/08/1932 | |
| Bermuda | Extension | 18/07/1936 | |
| BRAZIL | Accession | 26/08/1942 | |
| British Guiana | Extension | 18/07/1936 | |
| British Honduras | Extension | 18/07/1936 | |
| British Solomon Islands | Extension | 07/09/1938 | |
| Ceylon | Extension | 18/07/1936 | |
| COLOMBIA | Signature | 07/06/1930 | |
| Curacao | Extension | 16/07/1935 | |
| Cyprus | Extension | 18/07/1936 | |
| CYPRUS | Succession | 05/03/1968 | |
| CYPRUS | Declaration | 05/03/1968 | |
| CZECHOSLOVAKIA | Signature | 07/06/1930 | |
| DANZIG | Signature | 07/06/1930 | |
| DANZIG | Ratification | 24/06/1935 | |
| DENMARK | Signature | 07/06/1930 | |
| DENMARK | Ratification | 27/07/1932 | |
| East Indies | Extension | 16/07/1935 | |
| ECUADOR | Signature | 07/06/1930 | |
| Falkland Islands | Extension | 07/09/1938 | |
| Fiji | Extension | 18/07/1936 | |
| FIJI | Succession | 25/03/1971 | |
| FINLAND | Signature | 07/06/1930 | |
| FINLAND | Ratification | 31/08/1932 | |
| FINLAND | Notification | 06/06/1977 | 04/09/1977 |
| FRANCE | Accession | 27/04/1936 | |
| GERMAN DEMOCRATIC REPUBLIC | Declaration | 01/01/1905 | |
| GERMAN DEMOCRATIC REPUBLIC | Re-Application | 08/03/1958 | |
| GERMAN DEMOCRATIC REPUBLIC | Re-Application | 06/06/1958 | |
| GERMANY | Signature | 07/06/1930 | |
| GERMANY | Ratification | 31/08/1932 | 03/10/1933 |
| GERMANY FEDERAL REPUBLIC | Re-Application | 01/01/1953 | |
| GERMANY FEDERAL REPUBLIC | Re-Application | 20/07/1955 | |
| GERMANY FEDERAL REPUBLIC | Declaration | 12/09/1974 | |
| Gibraltar | Extension | 18/07/1936 | |
| Gilbert And Ellice Islands | Extension | 07/09/1938 | |
| Gold Coast | Extension | 18/07/1936 | |
| HUNGARY | Accession | 28/10/1964 | |
| Irish Free State | Extension | 10/07/1936 | |
| ITALY | Signature | 07/06/1930 | |
| ITALY | Ratification | 31/08/1932 | |
| Jamaica | Extension | 03/08/1939 | |
| JAPAN | Signature | 07/06/1930 | |
| JAPAN | Ratification | 31/08/1932 | |
| JORDAN | Withdrawal | 01/01/1905 | |
| KAZAKHSTAN | Accession | 20/11/1995 | 18/02/1996 |
| Kenya | Extension | 18/07/1936 | |
| LITHUANIA | Accession | 10/02/1997 | 11/05/1997 |
| Macao | Extension | 29/09/1999 | 20/12/1999 |
| Macao | Communication | 19/10/1999 | |
| Malay States, Federated | Extension | 18/07/1936 | |
| Malay States, Unfederated | Extension | 18/07/1936 | |
| MALAYSIA | Succession | 14/01/1960 | |
| Malta | Extension | 18/07/1936 | |
| Mauritius | Extension | 07/09/1938 | |
| NETHERLANDS THE | Signature | 07/06/1930 | |
| NETHERLANDS THE | Ratification | 20/08/1932 | |
| NETHERLANDS THE | Declaration | 16/07/1935 | |
| NETHERLANDS THE | Declaration | 07/08/1935 | |
| NETHERLANDS THE | Declaration | 01/01/1986 | |
| New Hebrides | Extension | 16/03/1939 | |
| Newfoundland (UK) | Extension | 07/05/1934 | |
| Northern Rhodesia | Extension | 18/07/1936 | |
| Northern Rhodesia | Declaration | 20/07/1955 | |
| NORWAY | Signature | 07/06/1930 | |
| NORWAY | Ratification | 27/07/1932 | |
| Nyasaland | Extension | 18/07/1936 | |
| Nyasaland | Declaration | 20/07/1955 | |
| Palestine | Extension | 18/07/1936 | |
| PAPUA NEW GUINEA | Succession | 12/02/1981 | 13/05/1981 |
| PERU | Signature | 07/06/1930 | |
| POLAND | Accession | 19/12/1936 | |
| PORTUGAL | Signature | 07/06/1930 | |
| PORTUGAL | Ratification | 08/06/1934 | |
| PORTUGAL | Declaration | 16/11/1953 | |
| PORTUGAL | Communication | 29/09/1999 | |
| SAAR TERRITORY | Signature | 07/06/1930 | |
| SAAR TERRITORY | Ratification | 05/03/1963 | |
| Seychelles | Extension | 18/07/1936 | |
| Sierra Leone | Extension | 18/07/1936 | |
| Somaliland Protectorate | Extension | 03/08/1939 | |
| SOVIET UNION | Accession | 25/11/1936 | |
| SPAIN | Signature | 07/06/1930 | |
| St Helena And Ascension | Extension | 07/09/1938 | |
| Straits Settlements | Extension | 18/07/1936 | |
| Surinam | Extension | 07/08/1936 | |
| Swaziland | Extension | 18/07/1936 | |
| SWEDEN | Signature | 07/06/1930 | |
| SWEDEN | Ratification | 27/07/1932 | |
| SWITZERLAND | Signature | 07/06/1930 | |
| SWITZERLAND | Ratification | 26/08/1932 | |
| Tanganyika | Extension | 07/09/1938 | |
| The Gambia | Extension | 18/07/1936 | |
| Tonga | Extension | 07/09/1938 | |
| TONGA | Succession | 02/02/1972 | |
| TONGA | Declaration | 02/02/1972 | |
| Trinidad And Tobago | Extension | 18/07/1936 | |
| TURKEY | Signature | 07/06/1930 | |
| Uganda | Extension | 18/07/1936 | |
| UGANDA | Succession | 15/04/1965 | |
| UKRAINE | Accession | 08/10/1999 | 06/01/2000 |
| UNITED KINGDOM | Ratification | 18/04/1934 | |
| UNITED KINGDOM | Accession | 18/04/1934 | |
| UNITED KINGDOM | Declaration | 07/05/1934 | |
| UNITED KINGDOM | Declaration | 10/07/1936 | |
| UNITED KINGDOM | Declaration | 18/07/1936 | |
| UNITED KINGDOM | Declaration | 03/09/1938 | |
| UNITED KINGDOM | Declaration | 07/09/1938 | |
| UNITED KINGDOM | Declaration | 16/03/1939 | |
| UNITED KINGDOM | Declaration | 03/08/1939 | |
| UNITED KINGDOM | Declaration | 01/01/1953 | |
| Windward Islands | Extension | 18/07/1936 | |
| YUGOSLAVIA | Signature | 07/06/1930 | |
| Zanzibar | Extension | 07/09/1938 | |