| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| Aden Colony | Extension | 15/12/1950 | |
| ALBANIA | Signature | 22/11/1928 | |
| ALBANIA | Ratification | 17/12/1930 | |
| ALBANIA | Withdrawal | 13/04/1949 | 13/04/1950 |
| ARGENTINA | Accession | 07/12/1982 | |
| AUSTRALIA | Signature | 22/11/1928 | |
| AUSTRALIA | Ratification | 30/01/1935 | |
| AUSTRALIA | Withdrawal | 18/08/1944 | 18/08/1945 |
| AUSTRALIA | Re-Accession | 27/09/1973 | |
| AUSTRIA | Accession | 15/12/1947 | 15/01/1948 |
| Bahamas | Extension | 22/10/1951 | |
| Barbados | Extension | 15/12/1950 | |
| BELGIUM | Signature | 22/11/1928 | |
| BELGIUM | Ratification | 15/04/1931 | |
| BELGIUM | Reservation | 15/04/1931 | |
| BOLIVIA | Accession | 07/12/1982 | |
| BOLIVIA | Denunciation | 28/09/1988 | |
| BRAZIL | Signature | 22/11/1928 | |
| BRAZIL | Ratification | 05/11/1970 | |
| BRAZIL | Withdrawal | 24/07/1980 | |
| British Guiana | Extension | 15/12/1950 | |
| British Honduras | Extension | 15/12/1950 | |
| Brunei | Extension | 15/12/1950 | |
| BULGARIA | Accession | 31/03/1960 | |
| BYELORUSSIA S S R | Accession | 30/03/1960 | |
| CANADA | Signature | 22/11/1928 | |
| CANADA | Ratification | 22/05/1934 | |
| CANADA | Reservation | 22/05/1934 | |
| CANADA | Withdrawal | 01/08/1945 | |
| CANADA | Re-Accession | 08/11/1951 | |
| CHILE | Accession | 07/12/1982 | |
| CHILE | Denunciation | 17/12/1987 | |
| COLOMBIA | Signature | 22/11/1928 | |
| COSTA RICA | Accession | 23/11/1982 | |
| CUBA | Signature | 22/11/1928 | |
| CUBA | Accession | 18/02/1976 | |
| Cyprus | Extension | 17/04/1951 | |
| CZECHOSLOVAKIA | Withdrawal | 29/12/1950 | |
| CZECHOSLOVAKIA | Accession | 09/01/1932 | |
| CZECHOSLOVAKIA | Re-Accession | 01/04/1960 | |
| DENMARK | Signature | 22/11/1928 | |
| DENMARK | Ratification | 26/03/1932 | |
| DOMINICAN REPUBLIC | Signature | 22/11/1928 | |
| EL SALVADOR | Accession | 07/12/1982 | |
| EL SALVADOR | Withdrawal | 05/10/1987 | 05/10/1987 |
| Falkland Islands | Extension | 15/12/1950 | |
| Fiji | Extension | 15/12/1950 | |
| FINLAND | Accession | 03/07/1937 | |
| FRANCE | Signature | 22/11/1928 | |
| FRANCE | Ratification | 17/12/1930 | |
| GERMAN DEMOCRATIC REPUBLIC | Accession | 23/02/1953 | |
| GERMANY | Signature | 22/11/1928 | |
| GERMANY | Ratification | 17/12/1930 | |
| GERMANY FEDERAL REPUBLIC | Accession | 01/04/1956 | |
| GERMANY FEDERAL REPUBLIC | Objection | 15/02/1974 | |
| Gibraltar | Extension | 15/12/1950 | |
| Gold Coast | Extension | 15/12/1950 | |
| GREECE | Signature | 22/11/1928 | |
| GREECE | Ratification | 21/01/1933 | |
| GUATEMALA | Signature | 22/11/1928 | |
| GUATEMALA | Acceptance | 18/10/2007 | 18/10/2007 |
| HAYTI | Signature | 22/11/1928 | |
| HAYTI | Ratification | 17/06/1949 | |
| Hong Kong | Extension | 15/12/1950 | |
| HUNGARY | Signature | 22/11/1928 | |
| HUNGARY | Ratification | 01/04/1960 | |
| ISRAEL | Accession | 31/05/1952 | |
| ISRAEL | Withdrawal | 26/02/1988 | |
| ITALY | Signature | 22/11/1928 | |
| ITALY | Ratification | 19/01/1931 | |
| Jamaica | Extension | 17/04/1951 | |
| JAPAN | Signature | 08/01/1965 | |
| KOREA REPUBLIC OF | Accession | 19/05/1987 | |
| LEBANON | Accession | 15/09/1947 | |
| Leeward Islands | Extension | 15/12/1950 | |
| LESOTHO | Accession | 26/10/2011 | |
| MALAWI | Accession | 05/10/2011 | |
| Malaya | Extension | 15/12/1950 | |
| Malta | Extension | 15/12/1950 | |
| Mauritius | Extension | 15/12/1950 | |
| MEXICO | Accession | 07/12/1982 | |
| MONACO | Accession | 29/04/1958 | |
| MOROCCO | Signature | 22/11/1928 | |
| MOROCCO | Ratification | 14/01/1931 | |
| NETHERLANDS THE | Withdrawal | 26/10/1945 | |
| NETHERLANDS THE | Signature | 22/11/1928 | |
| NETHERLANDS THE | Ratification | 24/12/1932 | |
| NETHERLANDS THE | Re-Accession | 08/01/1951 | |
| NEW ZEALAND | Accession | 12/07/1950 | |
| NICARAGUA | Accession | 07/12/1982 | |
| Nigeria | Extension | 15/12/1950 | |
| NIGERIA | Accession | 02/01/1963 | |
| North Borneo | Extension | 15/12/1950 | |
| Northern Rhodesia | Extension | 15/12/1950 | |
| NORWAY | Accession | 24/12/1936 | |
| Nyasaland | Extension | 15/12/1950 | |
| PANAMA | Accession | 03/12/1982 | |
| PANAMA | Withdrawal | 13/10/1988 | |
| PERU | Signature | 22/11/1928 | |
| PERU | Ratification | 07/12/1982 | |
| PHILIPPINES | Adherence | 12/08/1993 | |
| POLAND | Signature | 22/11/1928 | |
| POLAND | Ratification | 28/07/1932 | |
| POLAND | Withdrawal | 25/09/1951 | |
| POLAND | Re-Accession | 04/04/1960 | |
| PORTUGAL | Signature | 22/11/1928 | |
| PORTUGAL | Ratification | 11/01/1932 | |
| ROUMANIA | Signature | 22/11/1928 | |
| ROUMANIA | Ratification | 17/12/1930 | |
| ROUMANIA | Re-Accession | 05/04/1960 | |
| Sarawak | Extension | 15/12/1950 | |
| Seychelles | Extension | 15/12/1950 | |
| Sierra Leone | Extension | 15/12/1950 | |
| Singapore | Extension | 15/12/1950 | |
| SLOVAK REPUBLIC | Adherence | 08/07/1993 | |
| SLOVENIA | Accession | 02/11/2004 | 01/01/1900 |
| SOLOMON ISLANDS | Provisional application | 01/01/1905 | |
| SOLOMON ISLANDS | Denunciation | 07/08/1981 | |
| Somaliland Protectorate | Extension | 15/12/1950 | |
| SOUTH AFRICA | Accession | 01/09/1993 | |
| SOVIET UNION | Declaration | 01/01/1905 | |
| SOVIET UNION | Signature | 22/11/1928 | |
| SOVIET UNION | Ratification | 12/11/1935 | |
| SOVIET UNION | Denunciation | 20/01/1948 | 25/12/1948 |
| SOVIET UNION | Re-Accession | 09/06/1959 | |
| SPAIN | Signature | 22/11/1928 | |
| SPAIN | Ratification | 17/12/1930 | |
| SPAIN | Withdrawal | 17/03/1941 | |
| SPAIN | Re-Accession | 03/11/1971 | 03/12/1972 |
| St Helena | Extension | 15/12/1950 | |
| SWEDEN | Signature | 22/11/1928 | |
| SWEDEN | Ratification | 17/12/1930 | |
| SWITZERLAND | Signature | 22/11/1928 | |
| SWITZERLAND | Ratification | 17/12/1930 | |
| Tanganyika | Extension | 15/12/1950 | |
| TANGANYIKA | Accession | 26/03/1963 | |
| TANGANYIKA | Withdrawal | 19/08/1977 | 19/08/1978 |
| The Gambia | Extension | 15/12/1950 | |
| Trinidad And Tobago | Extension | 15/12/1950 | |
| TUNISIA | Signature | 22/11/1928 | |
| TUNISIA | Ratification | 17/12/1930 | |
| Uganda | Extension | 15/12/1950 | |
| UKRAINE | Accession | 30/03/1960 | |
| UNITED KINGDOM | Signature | 22/11/1928 | |
| UNITED KINGDOM | Ratification | 17/12/1930 | |
| UNITED KINGDOM | Declaration | 17/12/1930 | |
| UNITED KINGDOM | Denunciation | 30/05/1944 | 05/06/1945 |
| UNITED KINGDOM | Re-Accession | 02/09/1949 | |
| UNITED KINGDOM | Declaration | 15/12/1950 | |
| UNITED KINGDOM | Declaration | 17/04/1951 | |
| UNITED KINGDOM | Declaration | 22/10/1951 | |
| UNITED STATES OF AMERICA | Accession | 24/03/1968 | |
| URUGUAY | Accession | 10/06/1983 | |
| VENEZUELA | Accession | 23/11/1982 | |
| Western Pacific High Commsn Territories | Extension | 15/12/1950 | |
| Windward Islands | Extension | 15/12/1950 | |
| YUGOSLAVIA | Signature | 22/11/1928 | |
| Zanzibar | Extension | 15/12/1950 |