| Country | Action | Action Date | Effective Date |
|---|
| Aden Colony | Extension | 27/03/1950 | |
| ALGERIA | Ratification | 19/10/1962 | |
| ANGOLA | Succession | 04/06/1976 | |
| Antigua | Extension | 27/03/1950 | 15/06/1974 |
| ANTIGUA AND BARBUDA | Ratification | 02/02/1983 | |
| Antilles | Extension | 05/08/1957 | |
| ARGENTINA | Ratification | 14/03/1950 | |
| Aruba | Extension | 01/01/1986 | 01/01/1986 |
| AUSTRALIA | Declaration | 15/06/1973 | |
| AUSTRALIA | Ratification | 08/02/1996 | 08/02/1996 |
| AUSTRALIA | Declaration | 08/02/1996 | |
| AUSTRIA | Signature | 10/06/1925 | |
| AUSTRIA | Ratification | 21/08/1936 | |
| Bahamas | Extension | 27/03/1950 | 15/06/1974 |
| BAHAMAS | Succession | 25/05/1976 | |
| Barbados | Extension | 27/03/1950 | |
| Barbados | Declaration | 08/02/1965 | |
| BARBADOS | Succession | 08/05/1967 | |
| Basutoland | Extension | 27/03/1950 | |
| Bechuanaland | Extension | 27/03/1950 | |
| BELGIUM | Signature | 10/06/1925 | |
| BELGIUM | Ratification | 03/10/1927 | |
| BELGIUM | Withdrawal Res. | 01/04/1934 | |
| Bermuda | Decision Resvd. | 17/06/1966 | 15/06/1974 |
| BOLIVIA | Ratification | 15/11/1973 | |
| BOSNIA AND HERZEGOVINA | Ratification | 02/06/1993 | 02/06/1993 |
| British Guiana | Extension | 27/03/1950 | |
| British Honduras | Accession | 26/10/1926 | |
| British Honduras | Extension | 27/03/1950 | 15/06/1974 |
| British Virgin Islands | Extension | 17/09/1964 | 15/06/1974 |
| Brunei | Decision Resvd. | 27/03/1950 | |
| BULGARIA | Signature | 10/06/1925 | |
| BULGARIA | Ratification | 05/09/1929 | |
| BURKINA FASO | Ratification | 30/06/1969 | 30/06/1970 |
| BURMA | Ratification | 16/02/1956 | |
| BURUNDI | Ratification | 11/03/1963 | |
| CAPE VERDE | Ratification | 03/04/1979 | |
| CENTRAL AFRICAN REPUBLIC | Ratification | 09/06/1964 | |
| CHILE | Signature | 10/06/1925 | |
| CHILE | Ratification | 08/10/1931 | |
| CHILE | Denunciation | 08/08/2000 | 08/08/2001 |
| CHINA | Declaration | 20/10/1999 | |
| COLOMBIA | Signature | 10/06/1925 | |
| COLOMBIA | Ratification | 20/06/1933 | |
| COMOROS | Succession | 23/10/1978 | |
| CUBA | Signature | 10/06/1925 | |
| CUBA | Ratification | 06/08/1928 | |
| Cyprus | Extension | 27/03/1950 | |
| CZECH REPUBLIC | Succession | 01/01/1993 | 01/01/1993 |
| CZECHOSLOVAKIA | Ratification | 12/06/1950 | |
| DJIBOUTI | Ratification | 03/08/1978 | 03/08/1978 |
| Dominica | Extension | 27/03/1950 | 15/06/1974 |
| EGYPT | Ratification | 10/05/1960 | |
| Falkland Islands | Extension | 27/03/1950 | 15/06/1974 |
| Fiji | Extension | 07/01/1966 | |
| FINLAND | Signature | 10/06/1925 | |
| FINLAND | Ratification | 20/01/1950 | |
| FRANCE | Signature | 10/06/1925 | |
| FRANCE | Ratification | 17/05/1948 | |
| FRANCE | Declaration | 27/11/1974 | |
| GERMANY FEDERAL REPUBLIC | Accession | 14/06/1955 | |
| Gibraltar | Decision Resvd. | 29/12/1958 | 15/06/1974 |
| Gilbert And Ellice Islands | Decision Resvd. | 15/08/1967 | 15/06/1974 |
| Gold Coast | Extension | 27/03/1950 | |
| GREECE | Ratification | 13/04/1952 | |
| Grenada | Extension | 27/03/1950 | 15/06/1974 |
| Guernsey | Extension | 28/06/1949 | |
| GUINEA | Succession | 12/12/1966 | |
| GUINEA BISSAU | Succession | 21/02/1977 | |
| HAITI | Accession | 19/04/1955 | |
| Hong Kong | Declaration | 01/01/1905 | |
| Hong Kong | Extension | 12/11/1974 | |
| Hong Kong | Declaration | 24/11/1978 | |
| Hong Kong | Decision Resvd. | 14/01/1981 | |
| HUNGARY | Signature | 10/06/1925 | |
| HUNGARY | Ratification | 19/04/1928 | |
| IRAQ | Signature | 10/06/1925 | |
| IRAQ | Ratification | 05/07/1960 | |
| Isle of Man | Extension | 28/06/1949 | |
| Jamaica | Extension | 27/03/1950 | |
| Jersey | Extension | 28/06/1949 | |
| Kenya | Extension | 27/03/1950 | |
| KENYA | Succession | 13/01/1964 | |
| LATVIA | Signature | 10/06/1925 | |
| LATVIA | Ratification | 29/05/1928 | |
| LEBANON | Ratification | 01/06/1977 | |
| Leeward Islands | Extension | 27/03/1950 | |
| LUXEMBOURG | Signature | 10/06/1925 | |
| LUXEMBOURG | Ratification | 16/04/1928 | |
| Malaya | Extension | 11/11/1957 | |
| MALAYA | Accession | 11/11/1957 | |
| MALAYSIA | Ratification | 03/03/1964 | |
| MALI | Ratification | 12/12/1968 | |
| MALTA | Succession | 04/01/1965 | |
| MAURITANIA | Ratification | 08/11/1963 | |
| Mauritius | Extension | 27/03/1950 | 15/06/1974 |
| MAURITIUS | Succession | 02/12/1969 | |
| MEXICO | Signature | 10/06/1925 | |
| MEXICO | Ratification | 12/05/1934 | |
| Montserrat | Extension | 05/07/1962 | |
| MOROCCO | Accession | 20/09/1956 | |
| MOZAMBIQUE | Ratification | 06/06/1977 | |
| NETHERLANDS THE | Signature | 10/06/1925 | |
| NETHERLANDS THE | Ratification | 13/09/1927 | |
| NETHERLANDS THE | Declaration | 01/01/1986 | 01/01/1986 |
| New Guinea | Decision Resvd. | 15/06/1973 | |
| NEW ZEALAND | Signature | 10/06/1925 | |
| NEW ZEALAND | Ratification | 29/03/1938 | |
| NICARAGUA | Signature | 10/06/1925 | |
| NICARAGUA | Ratification | 12/04/1934 | |
| Nigeria | Extension | 27/03/1950 | |
| Norfolk Island | Decision Resvd. | 15/06/1973 | |
| Norfolk Island | Extension | 08/02/1996 | |
| North Borneo | Extension | 27/03/1950 | |
| Northern Rhodesia | Extension | 27/03/1950 | |
| Nyasaland | Extension | 27/03/1950 | |
| PANAMA | Accession | 03/06/1958 | |
| Papua | Decision Resvd. | 15/06/1973 | |
| PHILIPPINES | Ratification | 17/11/1960 | |
| POLAND | Signature | 10/06/1925 | |
| POLAND | Ratification | 03/11/1937 | |
| PORTUGAL | Signature | 10/06/1925 | |
| PORTUGAL | Ratification | 27/03/1929 | |
| PORTUGAL | Declaration | 04/10/1999 | |
| RWANDA | Ratification | 18/09/1962 | |
| SAINT LUCIA | Ratification | 14/05/1980 | |
| SAO TOME AND PRINCIPE | Ratification | 01/06/1982 | |
| Sarawak | Decision Resvd. | 23/02/1959 | |
| Seychelles | Decision Resvd. | 27/03/1950 | |
| Sierra Leone | Extension | 29/12/1958 | |
| SIERRA LEONE | Ratification | 13/06/1961 | |
| Singapore | Extension | 27/03/1950 | |
| SLOVAK REPUBLIC | Succession | 01/01/1993 | 01/01/1993 |
| SLOVENIA | Ratification | 09/06/1992 | 09/06/1992 |
| Solomon Islands | Extension | 27/02/1959 | |
| SOMALI DEMOCRATIC REPUBLIC | Succession | 11/06/1975 | |
| SOMALIA | Ratification | 18/11/1960 | |
| Southern Rhodesia | Extension | 27/03/1950 | |
| SPAIN | Signature | 10/06/1925 | |
| SPAIN | Ratification | 22/02/1929 | |
| St Helena | Extension | 27/03/1950 | 15/06/1974 |
| St Helena | Declaration | 14/02/1986 | |
| St Helena | Declaration | 18/02/1986 | 18/02/1986 |
| St Kitts Nevis Anguilla | Extension | 27/03/1950 | 17/04/1950 |
| St Lucia | Extension | 06/11/1967 | |
| St Vincent | Extension | 27/03/1950 | |
| Surinam | Extension | 15/04/1958 | |
| SURINAME | Succession | 15/06/1976 | |
| Swaziland | Extension | 12/06/1964 | |
| SWEDEN | Signature | 10/06/1925 | |
| SWEDEN | Ratification | 08/09/1926 | |
| SWEDEN | Denunciation | 17/06/1969 | |
| SYRIA | Ratification | 30/10/1961 | |
| Tanganyika | Extension | 27/03/1950 | |
| Tanganyika | Extension | 30/01/1962 | |
| TANGANYIKA AND ZANZIBAR | Ratification | 22/06/1964 | |
| The Gambia | Extension | 27/03/1950 | |
| Trinidad | Extension | 27/03/1950 | |
| TUNISIA | Accession | 15/05/1957 | |
| Uganda | Extension | 21/02/1962 | |
| UGANDA | Succession | 04/06/1963 | |
| UNITED ARAB REPUBLIC | Accession | 10/05/1960 | |
| UNITED KINGDOM | Signature | 10/06/1925 | |
| UNITED KINGDOM | Ratification | 28/06/1949 | |
| URUGUAY | Signature | 10/06/1925 | |
| URUGUAY | Ratification | 06/06/1933 | |
| URUGUAY | Denunciation | 28/07/1978 | 28/07/1979 |
| YUGOSLAVIA | Signature | 10/06/1925 | |
| YUGOSLAVIA | Ratification | 01/04/1927 | |
| YUGOSLAVIA, FEDERAL REPUBLIC OF | Ratification | 24/11/2000 | 24/11/2000 |
| ZAIRE | Ratification | 20/09/1960 | |
| ZAMBIA | Ratification | 02/12/1964 | |
| Zanzibar | Decision Resvd. | 27/03/1950 | |