| Country | Action | Action Date | Effective Date |
|---|
| ALBANIA | Ratification | 25/06/1957 | |
| ALGERIA | Ratification | 19/10/1962 | |
| ANGOLA | Ratification | 04/06/1976 | |
| ANTIGUA AND BARBUDA | Ratification | 02/02/1983 | |
| ARGENTINA | Ratification | 14/03/1950 | |
| Aruba | Extension | 01/01/1986 | 01/01/1986 |
| AUSTRALIA | Ratification | 02/01/1932 | |
| AUSTRIA | Ratification | 07/06/1960 | |
| AZERBAIJAN | Ratification | 19/05/1992 | 19/05/1992 |
| Bahamas | Extension | 03/06/1931 | |
| BAHAMAS | Ratification | 25/05/1976 | |
| BAHRAIN | Ratification | 11/06/1981 | 11/06/1982 |
| BANGLADESH | Ratification | 22/06/1972 | |
| Barbados | Extension | 03/06/1931 | |
| BARBADOS | Ratification | 08/05/1967 | |
| Basutoland | Extension | 03/06/1931 | |
| Bechuanaland Protectorate | Extension | 03/06/1931 | |
| Belgian Congo | Extension | 20/01/1944 | |
| BELGIUM | Ratification | 20/01/1944 | |
| BELIZE | Ratification | 15/12/1983 | 15/12/1983 |
| BENIN | Ratification | 12/12/1960 | |
| Bermuda | Extension | 03/06/1931 | |
| BOSNIA AND HERZEGOVINA | Ratification | 02/06/1993 | 02/06/1993 |
| BRAZIL | Ratification | 25/04/1957 | |
| British Guiana | Extension | 03/06/1931 | |
| British Honduras | Extension | 03/06/1931 | |
| British Solomon Islands | Extension | 03/06/1931 | |
| BULGARIA | Ratification | 22/09/1932 | |
| BURKINA FASO | Ratification | 21/11/1960 | |
| BURMA | Ratification | 04/03/1955 | |
| BURUNDI | Ratification | 11/03/1963 | |
| BYELORUSSIA S S R | Ratification | 21/08/1956 | |
| CAMBODIA | Ratification | 24/02/1969 | |
| CAMEROON | Ratification | 07/06/1960 | |
| CAPE VERDE | Ratification | 03/04/1979 | |
| CENTRAL AFRICAN REPUBLIC | Ratification | 27/10/1960 | |
| Ceylon | Extension | 03/06/1931 | |
| CHAD | Ratification | 18/11/1960 | |
| CHILE | Ratification | 31/05/1933 | |
| CHINA | Declaration | 20/10/1999 | |
| COLOMBIA | Ratification | 04/03/1969 | |
| COMOROS | Ratification | 23/10/1978 | |
| CONGO | Ratification | 10/11/1960 | |
| COSTA RICA | Ratification | 02/06/1960 | |
| CROATIA | Ratification | 08/10/1991 | 08/10/1991 |
| CUBA | Ratification | 20/07/1953 | |
| Curacao | Extension | 31/03/1933 | |
| Cyprus | Extension | 03/06/1931 | |
| CYPRUS | Ratification | 23/09/1960 | |
| CZECH REPUBLIC | Ratification | 01/01/1993 | 01/01/1993 |
| CZECHOSLOVAKIA | Ratification | 30/10/1957 | |
| DENMARK | Ratification | 11/02/1932 | |
| DJIBOUTI | Ratification | 03/08/1978 | 03/08/1978 |
| DOMINICA, COMMONWEALTH OF | Ratification | 28/02/1983 | 28/02/1983 |
| DOMINICAN REPUBLIC | Ratification | 05/12/1956 | |
| ECUADOR | Ratification | 06/07/1954 | |
| EGYPT | Ratification | 29/11/1955 | |
| EQUATORIAL GUINEA | Ratification | 13/08/2001 | 13/08/2002 |
| ERITREA | Ratification | 22/02/2000 | 22/02/2001 |
| Falkland Islands | Extension | 03/06/1931 | |
| Fiji | Extension | 03/06/1931 | |
| FIJI | Ratification | 19/04/1974 | |
| FINLAND | Ratification | 13/01/1936 | |
| FRANCE | Ratification | 24/06/1937 | |
| French Equatorial Africa | Extension | 24/06/1937 | |
| French Indo-china | Extension | 24/06/1937 | |
| French Settlements In Oceania | Extension | 24/06/1937 | |
| French West Africa | Extension | 24/06/1937 | |
| GABON | Ratification | 14/10/1960 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 13/06/1956 | |
| GHANA | Ratification | 20/05/1957 | |
| Gibraltar | Extension | 03/06/1931 | |
| Gilbert And Ellice Islands | Extension | 03/06/1931 | |
| Gold Coast | Extension | 03/06/1931 | |
| GREECE | Ratification | 13/06/1952 | |
| GRENADA | Ratification | 09/07/1979 | |
| GUATEMALA | Ratification | 13/06/1989 | 13/06/1990 |
| Guernsey | Extension | 03/06/1931 | |
| GUINEA | Ratification | 21/01/1959 | |
| GUINEA BISSAU | Ratification | 21/02/1977 | |
| GUYANA | Ratification | 08/06/1966 | |
| HAITI | Ratification | 04/03/1958 | |
| HONDURAS | Ratification | 21/02/1957 | |
| Hong Kong | Extension | 03/06/1931 | |
| HUNGARY | Ratification | 08/06/1956 | |
| ICELAND | Ratification | 17/02/1958 | |
| INDIA | Ratification | 30/11/1954 | |
| Indies | Extension | 31/03/1933 | |
| INDONESIA | Ratification | 12/06/1950 | |
| IRAN | Ratification | 10/06/1957 | |
| IRAQ | Ratification | 27/11/1962 | |
| IRELAND, REPUBLIC OF | Ratification | 02/03/1931 | |
| Isle of Man | Extension | 03/06/1931 | |
| ISRAEL | Ratification | 07/06/1955 | |
| ITALY | Ratification | 18/06/1934 | |
| IVORY COAST | Ratification | 21/11/1960 | |
| Jamaica | Extension | 03/06/1931 | |
| JAMAICA | Ratification | 26/11/1962 | |
| JAPAN | Ratification | 21/11/1932 | |
| Jersey | Extension | 03/06/1931 | |
| JORDAN | Ratification | 06/06/1966 | |
| KAZAKHSTAN | Ratification | 18/05/2001 | 18/05/2002 |
| Kenya | Extension | 03/06/1931 | |
| KENYA | Ratification | 13/01/1964 | |
| KIRIBATI | Ratification | 03/02/2000 | 03/02/2000 |
| KUWAIT | Ratification | 23/09/1968 | |
| KYRGYZSTAN | Ratification | 31/03/1992 | 31/03/1992 |
| LAOS | Ratification | 23/01/1964 | |
| LEBANON | Ratification | 01/06/1977 | |
| Leeward Islands | Extension | 03/06/1931 | |
| LESOTHO | Ratification | 31/10/1966 | |
| LIBERIA | Ratification | 01/05/1931 | |
| LIBYA | Ratification | 13/06/1961 | |
| LITHUANIA | Ratification | 26/09/1994 | 26/09/1995 |
| LUXEMBOURG | Ratification | 24/07/1964 | |
| Madagascar | Extension | 24/06/1937 | |
| MADAGASCAR | Ratification | 01/11/1960 | |
| MALAWI | Ratification | 19/11/1999 | 19/11/2000 |
| Malay States, Federated | Extension | 03/06/1931 | |
| Malay States, Unfederated | Extension | 03/06/1931 | |
| MALAYSIA | Ratification | 11/11/1957 | |
| MALI | Ratification | 22/09/1960 | |
| Malta | Extension | 03/06/1931 | |
| MALTA | Ratification | 04/01/1965 | |
| MAURITANIA | Ratification | 20/06/1961 | |
| Mauritius | Extension | 03/06/1931 | |
| MAURITIUS | Ratification | 02/12/1969 | |
| MEXICO | Ratification | 12/05/1934 | |
| MOLDOVA REPUBLIC OF | Ratification | 23/03/2000 | 23/03/2001 |
| MONGOLIA | Ratification | 15/03/2005 | 15/03/2005 |
| MOROCCO | Ratification | 20/05/1957 | |
| MOZAMBIQUE | Ratification | 16/06/2003 | 16/06/2004 |
| Nauru | Extension | 02/01/1932 | |
| NEPAL | Ratification | 03/01/2002 | 03/01/2003 |
| NETHERLANDS THE | Ratification | 31/03/1933 | |
| NETHERLANDS THE | Declaration | 26/10/1956 | |
| New Caledonia | Extension | 24/06/1937 | |
| New Guinea | Extension | 02/01/1932 | |
| New Guinea | Extension | 26/10/1956 | |
| NEW ZEALAND | Ratification | 29/03/1938 | |
| Newfoundland (UK) | Extension | 13/11/1931 | |
| NICARAGUA | Ratification | 12/04/1934 | |
| NIGER | Ratification | 27/02/1961 | |
| Nigeria | Extension | 03/06/1931 | |
| NIGERIA | Ratification | 17/10/1960 | |
| Norfolk Island | Extension | 02/01/1932 | |
| North Borneo | Extension | 03/06/1931 | |
| Northern Rhodesia | Extension | 03/06/1931 | |
| NORWAY | Ratification | 01/07/1932 | |
| Nyasaland | Extension | 03/06/1931 | |
| OMAN | Ratification | 30/10/1998 | 30/10/1999 |
| PAKISTAN | Ratification | 23/12/1957 | |
| Palestine | Extension | 03/06/1931 | |
| PANAMA | Ratification | 16/05/1966 | |
| Papua | Extension | 02/01/1932 | |
| PAPUA NEW GUINEA | Ratification | 01/05/1976 | |
| PARAGUAY | Ratification | 28/08/1967 | |
| PERU | Ratification | 01/02/1960 | |
| POLAND | Ratification | 30/07/1958 | |
| PORTUGAL | Ratification | 26/06/1956 | |
| PORTUGAL | Declaration | 04/10/1999 | |
| ROMANIA | Ratification | 28/05/1957 | |
| Ruanda Urundi | Extension | 20/01/1944 | |
| RUSSIAN FEDERATION | Ratification | 27/08/2001 | 27/08/2002 |
| SAINT LUCIA | Ratification | 14/05/1980 | 14/05/1980 |
| SAN MARINO | Ratification | 01/02/1995 | |
| Sarawak | Extension | 03/06/1931 | |
| SAUDI ARABIA | Ratification | 15/06/1978 | 15/06/1979 |
| SENEGAL | Ratification | 04/11/1960 | |
| Seychelles | Extension | 03/06/1931 | |
| SEYCHELLES | Ratification | 06/02/1978 | 06/02/1978 |
| Sierra Leone | Extension | 03/06/1931 | |
| SIERRA LEONE | Ratification | 13/06/1961 | |
| SINGAPORE | Ratification | 25/10/1965 | |
| SLOVAK REPUBLIC | Ratification | 01/01/1993 | 01/01/1993 |
| SLOVENIA | Ratification | 09/06/1992 | 09/06/1992 |
| SOLOMON ISLANDS | Succession | 06/08/1985 | 06/08/1985 |
| SOMALIA | Ratification | 18/11/1960 | |
| Somaliland Protectorate | Extension | 03/06/1931 | |
| Southern Rhodesia | Extension | 20/03/1933 | |
| SOVIET UNION | Ratification | 23/06/1956 | |
| SPAIN | Ratification | 29/08/1932 | |
| SRI LANKA | Ratification | 05/04/1950 | |
| St Helena And Ascension | Extension | 03/06/1931 | |
| ST VINCENT AND THE GRENADINES | Ratification | 21/10/1998 | 31/05/1995 |
| Straits Settlements | Extension | 03/06/1931 | |
| SUDAN | Ratification | 18/06/1957 | |
| Surinam | Extension | 31/03/1933 | |
| SURINAME | Ratification | 15/06/1976 | |
| Swaziland | Extension | 03/06/1931 | |
| SWAZILAND | Ratification | 26/04/1978 | |
| SWEDEN | Ratification | 22/12/1931 | |
| SWITZERLAND | Ratification | 23/05/1940 | |
| SYRIA | Ratification | 26/07/1960 | |
| TAJIKISTAN | Ratification | 26/11/1993 | 26/11/1993 |
| Tanganyika | Extension | 03/06/1931 | |
| TANGANYIKA | Ratification | 30/01/1962 | |
| THAILAND | Ratification | 26/02/1969 | |
| The Gambia | Extension | 03/06/1931 | |
| TOGO | Ratification | 07/06/1960 | |
| Tonga | Extension | 03/06/1931 | |
| Transjordan | Extension | 03/06/1931 | |
| Trinidad And Tobago | Extension | 03/06/1931 | |
| TRINIDAD AND TOBAGO | Ratification | 24/05/1963 | |
| TUNISIA | Ratification | 17/12/1962 | |
| Uganda | Extension | 03/06/1931 | |
| UGANDA | Ratification | 04/06/1963 | |
| UKRAINE | Ratification | 10/08/1956 | |
| UNITED ARAB EMIRATES | Ratification | 27/05/1982 | |
| UNITED KINGDOM | Ratification | 03/06/1931 | |
| UNITED KINGDOM | Declaration | 03/06/1931 | |
| UNITED KINGDOM | Declaration | 13/11/1931 | |
| UNITED KINGDOM | Declaration | 20/03/1933 | |
| URUGUAY | Ratification | 06/09/1995 | |
| VENEZUELA | Ratification | 20/11/1944 | |
| VIETNAM | Ratification | 06/06/1953 | |
| Windward Islands | Extension | 03/06/1931 | |
| YEMEN | Ratification | 14/04/1969 | |
| YEMEN ARAB REPUBLIC | Ratification | 29/07/1976 | |
| YUGOSLAVIA | Ratification | 04/03/1933 | |
| YUGOSLAVIA, FEDERAL REPUBLIC OF | Ratification | 24/11/2000 | 24/11/2000 |
| ZAIRE | Ratification | 20/09/1960 | |
| ZAMBIA | Ratification | 02/12/1964 | |
| Zanzibar | Extension | 03/06/1931 | |
| ZIMBABWE | Ratification | 27/08/1998 | 27/08/1999 |