| Country | Action | Action Date | Effective Date |
|---|
| AFGHANISTAN | Accession | 21/06/1935 | |
| ALBANIA | Accession | 09/10/1937 | |
| ALGERIA | Accession | 31/10/1963 | |
| Antigua | Extension | 18/05/1936 | |
| ARGENTINE REPUBLIC | Signature | 13/07/1931 | |
| ARGENTINE REPUBLIC | Ratification | 18/04/1936 | |
| ARGENTINE REPUBLIC | Declaration | 03/10/1983 | |
| AUSTRALIA | Accession | 24/01/1934 | |
| AUSTRIA | Signature | 13/07/1931 | |
| AUSTRIA | Ratification | 03/07/1934 | |
| Bahamas | Extension | 07/03/1949 | |
| BAHAMAS | Succession | 13/08/1975 | 11/11/1975 |
| Barbados | Extension | 24/08/1938 | |
| Basutoland | Extension | 13/02/1952 | 14/05/1952 |
| Bechuanaland | Extension | 13/02/1952 | 14/05/1952 |
| Belgian Congo | Extension | 17/12/1941 | |
| BELGIUM | Signature | 13/07/1931 | |
| BELGIUM | Ratification | 10/04/1933 | |
| Bermuda | Extension | 24/08/1938 | |
| BOLIVIA | Signature | 13/07/1931 | |
| BRAZIL | Signature | 13/07/1931 | |
| BRAZIL | Ratification | 05/04/1933 | |
| British Guiana | Extension | 24/08/1938 | |
| British Honduras | Extension | 18/05/1936 | |
| British Solomon Islands | Extension | 18/05/1936 | |
| British Virgin Islands | Extension | 18/05/1936 | |
| BULGARIA | Accession | 20/03/1933 | |
| Burma | Extension | 01/04/1937 | 01/04/1937 |
| CAMBODIA | Succession | 03/10/1951 | |
| CAMEROON | Succession | 20/11/1961 | |
| CANADA | Signature | 13/07/1931 | |
| CANADA | Ratification | 17/10/1932 | |
| CENTRAL AFRICAN REPUBLIC | Succession | 04/09/1962 | |
| Ceylon | Extension | 18/05/1936 | |
| CHILE | Signature | 13/07/1931 | |
| CHILE | Ratification | 31/03/1933 | |
| CHINA | Accession | 10/01/1934 | |
| COLOMBIA | Accession | 29/01/1934 | |
| CONGO | Succession | 21/05/1962 | |
| COSTA RICA | Signature | 13/07/1931 | |
| COSTA RICA | Ratification | 05/04/1933 | |
| CUBA | Signature | 13/07/1931 | |
| CUBA | Ratification | 04/04/1933 | |
| Curacao | Extension | 22/05/1933 | |
| Cyprus | Extension | 18/05/1936 | |
| CZECH REPUBLIC | Succession | 30/12/1993 | 01/01/1993 |
| CZECHOSLOVAKIA | Signature | 13/07/1931 | |
| CZECHOSLOVAKIA | Ratification | 12/04/1933 | |
| CZECHOSLOVAKIA | Declaration | 12/10/1933 | |
| DAHOMEY | Succession | 05/12/1961 | |
| DANZIG | Signature | 13/07/1931 | |
| DANZIG | Ratification | 18/04/1933 | |
| DENMARK | Signature | 13/07/1931 | |
| DENMARK | Ratification | 05/06/1936 | |
| Dominica | Extension | 18/05/1934 | |
| DOMINICAN REPUBLIC | Signature | 13/07/1931 | |
| DOMINICAN REPUBLIC | Ratification | 08/04/1933 | |
| East Indies | Extension | 22/05/1933 | |
| ECUADOR | Acceptance | 13/04/1935 | |
| EGYPT | Signature | 13/07/1931 | |
| EGYPT | Ratification | 10/04/1933 | |
| ESTONIA | Accession | 05/07/1935 | |
| Falkland Islands | Extension | 18/05/1936 | |
| Fiji | Extension | 24/08/1938 | |
| FIJI | Succession | 01/11/1971 | |
| FINLAND | Accession | 25/09/1936 | |
| FRANCE | Signature | 13/07/1931 | |
| FRANCE | Ratification | 10/04/1933 | |
| GERMAN DEMOCRATIC REPUBLIC | Declaration | 01/01/1905 | |
| GERMAN DEMOCRATIC REPUBLIC | Re-Application | 07/04/1958 | |
| GERMANY | Signature | 13/07/1931 | |
| GERMANY | Ratification | 10/04/1933 | |
| GERMANY FEDERAL REPUBLIC | Re-Application | 01/01/1953 | |
| GERMANY FEDERAL REPUBLIC | Re-Application | 20/07/1955 | |
| GERMANY FEDERAL REPUBLIC | Objection | 21/06/1973 | |
| GHANA | Succession | 07/04/1958 | |
| Gibraltar | Extension | 18/05/1936 | |
| Gilbert And Ellice Islands | Extension | 05/06/1949 | |
| Gold Coast | Extension | 18/05/1936 | |
| GREECE | Signature | 13/07/1931 | |
| GREECE | Ratification | 27/12/1934 | |
| GUATEMALA | Signature | 13/07/1931 | |
| GUATEMALA | Ratification | 01/05/1933 | |
| GUINEA | Succession | 26/04/1962 | |
| HAYTI | Accession | 04/05/1933 | |
| HEJAZ | Signature | 13/07/1931 | |
| HEJAZ | Ratification | 15/08/1936 | |
| HONDURAS | Accession | 21/09/1934 | |
| Hong Kong | Extension | 18/05/1936 | |
| HUNGARY | Accession | 10/04/1933 | |
| INDIA | Signature | 13/07/1931 | |
| INDIA | Ratification | 14/11/1932 | |
| INDONESIA | Accession | 03/04/1958 | |
| IRAQ | Accession | 30/05/1934 | |
| IRELAND, REPUBLIC OF | Accession | 11/04/1933 | |
| ISRAEL | Accession | 16/05/1952 | |
| ITALY | Signature | 13/07/1931 | |
| ITALY | Ratification | 21/03/1933 | |
| IVORY COAST | Succession | 08/12/1961 | |
| Jamaica | Extension | 07/03/1949 | |
| JAMAICA | Succession | 26/12/1963 | |
| JAPAN | Signature | 13/07/1931 | |
| JAPAN | Ratification | 03/06/1935 | |
| Kenya | Extension | 18/05/1936 | |
| LAOS | Succession | 07/10/1950 | |
| LATVIA | Accession | 03/08/1937 | |
| LIBERIA | Signature | 13/07/1931 | |
| LITHUANIA | Signature | 13/07/1931 | |
| LITHUANIA | Ratification | 10/04/1933 | |
| LUXEMBOURG | Signature | 13/07/1931 | |
| LUXEMBOURG | Ratification | 30/05/1936 | |
| MALAWI | Succession | 22/07/1965 | |
| Malay States, Federated | Extension | 24/08/1938 | |
| Malay States, Unfederated | Extension | 24/08/1938 | |
| MALAYA | Succession | 31/08/1957 | |
| Malta | Extension | 07/03/1949 | |
| Mauritius | Extension | 18/05/1936 | |
| MAURITIUS | Succession | 18/07/1969 | |
| MEXICO | Signature | 13/07/1931 | |
| MEXICO | Ratification | 13/03/1933 | |
| MEXICO | Reservation | 13/03/1933 | |
| MONACO | Signature | 13/07/1931 | |
| MONACO | Ratification | 16/02/1933 | |
| Montserrat | Extension | 18/05/1936 | |
| MOROCCO | Succession | 07/11/1956 | |
| NETHERLANDS THE | Signature | 13/07/1931 | |
| NETHERLANDS THE | Ratification | 22/05/1933 | |
| Netherlands West Indies | Extension | 07/03/1949 | |
| New Hebrides | Extension | 15/06/1950 | |
| New Hebrides Condominium | Extension | 15/06/1950 | |
| NEW ZEALAND | Accession | 17/06/1935 | |
| Newfoundland (UK) | Extension | 28/06/1937 | |
| NICARAGUA | Accession | 16/03/1932 | |
| NIGER | Succession | 25/08/1961 | |
| Nigeria | Extension | 18/05/1936 | |
| NIGERIA | Succession | 26/06/1961 | |
| North Borneo | Extension | 18/05/1936 | |
| Northern Rhodesia | Extension | 18/05/1936 | |
| NORWAY | Accession | 12/09/1934 | |
| Nyasaland | Extension | 18/05/1936 | |
| Palestine | Extension | 24/08/1938 | |
| PANAMA | Signature | 13/07/1931 | |
| PANAMA | Ratification | 15/04/1935 | |
| PAPUA NEW GUINEA | Succession | 28/10/1980 | |
| PARAGUAY | Signature | 13/07/1931 | |
| PARAGUAY | Ratification | 25/06/1941 | |
| PERSIA | Signature | 13/07/1931 | |
| PERSIA | Ratification | 28/09/1932 | |
| PERU | Accession | 20/05/1932 | |
| POLAND | Signature | 13/07/1931 | |
| POLAND | Ratification | 11/04/1933 | |
| PORTUGAL | Signature | 13/07/1931 | |
| PORTUGAL | Ratification | 17/06/1932 | |
| PORTUGAL | Reservation | 17/06/1932 | |
| ROUMANIA | Signature | 13/07/1931 | |
| ROUMANIA | Ratification | 11/04/1933 | |
| Ruanda Urundi | Extension | 17/12/1941 | |
| RWANDA | Succession | 05/08/1964 | |
| SALVADOR | Accession | 04/07/1933 | |
| SAN MARINO | Signature | 13/07/1931 | |
| SAN MARINO | Ratification | 12/06/1933 | |
| Sarawak | Extension | 18/05/1936 | |
| SENEGAL | Accession | 02/05/1963 | |
| Seychelles | Extension | 18/05/1936 | |
| SIAM | Signature | 13/07/1931 | |
| SIAM | Ratification | 22/02/1934 | |
| SIAM | Reservation | 22/02/1934 | |
| Sierra Leone | Extension | 18/05/1936 | |
| SIERRA LEONE | Succession | 13/03/1962 | |
| Somaliland Protectorate | Extension | 18/05/1936 | |
| South Africa | Extension | 04/01/1938 | |
| Southern Rhodesia | Extension | 14/07/1937 | |
| SOVIET UNION | Accession | 31/10/1935 | |
| SPAIN | Signature | 13/07/1931 | |
| SPAIN | Ratification | 07/04/1933 | |
| SRI LANKA | Succession | 04/12/1957 | |
| St Helena And Ascension | Extension | 24/08/1938 | |
| St Lucia | Extension | 07/03/1949 | |
| St. Christopher And Nevis | Extension | 18/05/1936 | |
| Straits Settlements | Extension | 18/05/1936 | |
| SUDAN | Accession | 25/08/1932 | |
| SUDAN | Declaration | 18/01/1933 | |
| Surinam | Extension | 22/05/1933 | |
| Swaziland | Extension | 13/02/1952 | 14/05/1952 |
| SWEDEN | Signature | 13/07/1931 | |
| SWEDEN | Ratification | 12/08/1932 | |
| SWITZERLAND | Signature | 13/07/1931 | |
| SWITZERLAND | Ratification | 10/04/1933 | |
| Tanganyika | Extension | 18/05/1936 | |
| TANGANYIKA AND ZANZIBAR | Accession | 03/07/1964 | |
| The Gambia | Extension | 18/05/1936 | |
| TOGO | Succession | 27/02/1962 | |
| Tonga | Extension | 18/05/1936 | |
| Transjordan | Extension | 24/08/1938 | |
| Trinidad And Tobago | Extension | 18/05/1936 | |
| TRINIDAD AND TOBAGO | Accession | 11/04/1966 | |
| TURKEY | Accession | 03/04/1933 | |
| Uganda | Extension | 18/05/1936 | |
| UGANDA | Accession | 20/10/1965 | |
| UNITED KINGDOM | Signature | 13/07/1931 | |
| UNITED KINGDOM | Ratification | 01/04/1933 | |
| UNITED KINGDOM | Objection | 28/02/1985 | |
| UNITED STATES OF AMERICA | Signature | 13/07/1931 | |
| UNITED STATES OF AMERICA | Ratification | 28/04/1932 | |
| UPPER VOLTA | Accession | 26/04/1963 | |
| URUGUAY | Signature | 13/07/1931 | |
| URUGUAY | Ratification | 07/04/1933 | |
| VENEZUELA | Signature | 13/07/1931 | |
| VENEZUELA | Ratification | 15/11/1933 | |
| VIETNAM | Succession | 11/08/1950 | |
| Windward Islands | Extension | 24/08/1938 | |
| YUGOSLAVIA | Accession | 10/06/1949 | |
| YUGOSLAVIA, FEDERAL REPUBLIC OF | Succession | 12/03/2001 | 27/04/1972 |
| ZAIRE | Succession | 15/10/1962 | |
| ZAMBIA | Succession | 09/04/1973 | 24/10/1964 |
| Zanzibar | Extension | 18/05/1936 | |
| ZIMBABWE | Succession | 01/12/1998 | 18/04/1980 |