| Country | Action | Action Date | Effective Date |
|---|
| ALBANIA | Ratification | 03/06/1957 | |
| ALGERIA | Ratification | 19/10/1962 | |
| Anguilla | Extension | 29/05/1963 | |
| Antigua | Extension | 04/06/1962 | |
| ANTIGUA AND BARBUDA | Ratification | 02/02/1983 | |
| ARGENTINA | Ratification | 26/05/1936 | |
| Aruba | Extension | 01/01/1986 | 01/01/1986 |
| AUSTRALIA | Ratification | 24/12/1957 | |
| AUSTRIA | Ratification | 12/06/1924 | |
| AZERBAIJAN | Ratification | 19/05/1992 | 19/05/1992 |
| Bahamas | Extension | 04/06/1962 | |
| BAHAMAS | Succession | 25/05/1976 | |
| BANGLADESH | Ratification | 22/06/1972 | |
| Barbados | Extension | 04/06/1962 | |
| BARBADOS | Succession | 08/05/1967 | |
| Basutoland | Extension | 26/11/1962 | |
| Bechuanaland | Extension | 12/06/1964 | |
| BELGIUM | Ratification | 19/07/1926 | |
| BELIZE | Succession | 15/12/1983 | 15/12/1983 |
| Bermuda | Extension | 04/06/1962 | |
| BOSNIA AND HERZEGOVINA | Ratification | 02/06/1993 | 02/06/1993 |
| BRAZIL | Ratification | 25/04/1957 | |
| British Guiana | Extension | 04/06/1962 | |
| British Honduras | Extension | 04/06/1962 | |
| British Virgin Islands | Extension | 05/10/1962 | |
| Brunei | Extension | 26/05/1965 | |
| BULGARIA | Ratification | 06/03/1925 | |
| BURUNDI | Succession | 11/03/1963 | |
| BYELORUSSIA S S R | Ratification | 06/11/1956 | |
| CAMEROON | Ratification | 07/06/1960 | |
| Cameroons | Extension | 29/01/1963 | |
| CENTRAL AFRICAN REPUBLIC | Ratification | 27/10/1960 | |
| CEYLON | Ratification | 25/08/1952 | |
| CHAD | Ratification | 10/11/1960 | |
| CHILE | Ratification | 15/09/1925 | |
| CHINA | Ratification | 27/04/1934 | |
| COLOMBIA | Ratification | 20/06/1933 | |
| Comoro Islands | Extension | 08/07/1958 | |
| COMOROS | Ratification | 23/10/1978 | 23/10/1978 |
| CONGO, DEMOCRATIC REPUBLIC OF | Ratification | 20/09/1960 | |
| CONGO, REPUBLIC OF | Ratification | 10/11/1960 | |
| Cook Islands | Extension | 26/10/1951 | |
| COSTA RICA | Ratification | 16/09/1963 | |
| CROATIA | Ratification | 08/10/1991 | |
| CUBA | Ratification | 22/08/1935 | |
| CYPRUS | Ratification | 08/10/1965 | 08/10/1965 |
| CZECH REPUBLIC | Succession | 01/01/1993 | 01/01/1993 |
| CZECHOSLOVAKIA | Ratification | 31/08/1923 | |
| DAHOMEY | Ratification | 12/12/1960 | |
| DENMARK | Ratification | 20/06/1930 | |
| DJIBOUTI | Succession | 03/08/1978 | 03/08/1978 |
| Dominica | Extension | 04/06/1962 | |
| DOMINICA, COMMONWEALTH OF | Succession | 28/02/1983 | |
| ECUADOR | Ratification | 10/03/1969 | |
| EGYPT | Ratification | 03/07/1954 | |
| ESTONIA | Succession | 08/09/1922 | 08/09/1922 |
| ETHIOPIA | Ratification | 04/06/1963 | |
| Falkland Islands | Extension | 04/06/1962 | |
| Faroe Islands | Extension | | 28/09/1960 |
| Fiji | Extension | 26/06/1962 | |
| FIJI | Succession | 19/04/1974 | |
| FINLAND | Ratification | 19/06/1923 | |
| FRANCE | Ratification | 23/03/1929 | |
| French Cameroons | Extension | 08/07/1958 | |
| French Cameroons | Extension | 03/09/1962 | |
| French Equatorial Africa | Extension | 08/07/1958 | |
| French Polynesia | Extension | 08/07/1958 | |
| French Somaliland | Extension | 08/07/1958 | |
| French Togoland | Extension | 08/07/1958 | |
| French West Africa | Extension | 08/07/1958 | |
| GABON | Ratification | 14/10/1960 | |
| GERMAN DEMOCRATIC REPUBLIC | Succession | 01/01/1974 | |
| GERMAN DEMOCRATIC REPUBLIC | Reservation | 01/01/1974 | |
| GERMANY | Ratification | 06/06/1925 | |
| GHANA | Ratification | 14/03/1968 | |
| Gibraltar | Extension | 04/06/1962 | |
| Gilbert & Ellice Colony | Extension | 04/06/1962 | |
| GREECE | Ratification | 13/06/1952 | |
| Greenland | Extension | 31/05/1954 | |
| Grenada | Extension | 27/06/1963 | |
| GRENADA | Succession | 09/07/1979 | |
| GUATEMALA | Ratification | 14/06/1988 | |
| Guernsey | Extension | 06/08/1923 | |
| GUINEA | Ratification | 21/01/1959 | |
| GUYANA | Ratification | 08/06/1966 | |
| Hong Kong | Extension | 04/06/1962 | |
| ICELAND | Ratification | 21/08/1956 | |
| India | Ratification | 11/05/1923 | |
| IRAQ | Ratification | 01/04/1985 | 01/04/1985 |
| IRELAND, REPUBLIC OF | Ratification | 17/06/1924 | |
| Irish Free State | Extension | 17/06/1924 | |
| Isle of Man | Extension | 06/08/1923 | |
| ITALY | Ratification | 08/09/1924 | |
| IVORY COAST | Ratification | 21/11/1960 | |
| JAMAICA | Succession | 08/07/1963 | |
| Jersey | Extension | 06/08/1923 | |
| Kenya | Extension | 04/06/1962 | |
| KENYA | Succession | 13/01/1964 | |
| KYRGYZSTAN | Ratification | 31/03/1992 | 31/03/1992 |
| LATVIA | Succession | 09/09/1924 | 09/09/1924 |
| LESOTHO | Ratification | 31/10/1966 | |
| LITHUANIA | Ratification | 26/09/1994 | 26/09/1994 |
| LUXEMBOURG | Ratification | 16/04/1928 | |
| Madagascar | Extension | 08/07/1958 | |
| MALAGASY REPUBLIC | Ratification | 01/11/1960 | |
| MALAWI | Succession | 22/03/1965 | |
| MALAYA | Ratification | 11/01/1960 | |
| MALI | Ratification | 21/06/1960 | |
| Malta | Extension | 26/06/1962 | |
| MALTA | Succession | 04/01/1965 | |
| MAURITANIA | Ratification | 20/06/1961 | |
| Mauritius | Extension | 04/06/1962 | |
| MAURITIUS | Ratification | 02/12/1969 | |
| MEXICO | Ratification | 20/05/1937 | |
| MOLDOVA REPUBLIC OF | Ratification | 04/04/2003 | 04/04/2003 |
| Montserrat | Extension | 04/06/1962 | |
| MOROCCO | Ratification | 20/05/1957 | |
| MOZAMBIQUE | Ratification | 06/06/1977 | |
| MYANMAR | Ratification | 11/05/1923 | |
| NETHERLANDS THE | Ratification | 20/08/1926 | |
| New Caledonia | Extension | 08/07/1958 | |
| New Guinea | Extension | 08/07/1959 | |
| NEW ZEALAND | Ratification | 29/03/1938 | |
| NICARAGUA | Ratification | 12/04/1934 | |
| NIGER | Ratification | 27/02/1961 | |
| NIGERIA | Ratification | 16/06/1961 | |
| Niue Island | Extension | 26/10/1951 | |
| Norfolk Island | Extension | 08/07/1959 | |
| Norfolk Island | Extension | 08/02/1996 | 08/02/1997 |
| Northern Rhodesia | Extension | 15/12/1962 | |
| NORWAY | Ratification | 11/06/1929 | |
| Nyasaland | Extension | 07/12/1962 | |
| PAKISTAN | Ratification | 11/05/1923 | |
| PANAMA | Ratification | 19/06/1970 | |
| Papua | Extension | 08/07/1959 | |
| PAPUA NEW GUINEA | Succession | 01/05/1976 | |
| PARAGUAY | Ratification | 16/05/1968 | |
| PERU | Ratification | 08/11/1945 | |
| POLAND | Ratification | 21/06/1924 | |
| PORTUGAL | Ratification | 27/09/1977 | |
| ROUMANIA | Ratification | 10/11/1930 | |
| RWANDA | Ratification | 18/09/1962 | |
| SAINT LUCIA | Ratification | 14/05/1980 | 14/05/1980 |
| Sarawak | Extension | 23/08/1962 | |
| SARAWAK | Ratification | 03/03/1964 | |
| SENEGAL | Ratification | 04/11/1960 | |
| Seychelles | Extension | 04/06/1962 | |
| SEYCHELLES | Succession | 06/02/1978 | 06/02/1978 |
| Singapore | Extension | 05/07/1962 | |
| SINGAPORE | Succession | 25/10/1965 | |
| SLOVAK REPUBLIC | Succession | 01/01/1993 | 01/01/1993 |
| SLOVENIA | Ratification | 09/06/1992 | 09/06/1992 |
| Solomon Islands | Extension | 04/06/1962 | |
| SOLOMON ISLANDS | Succession | 06/08/1985 | 06/08/1985 |
| SOVIET UNION | Ratification | 10/08/1956 | |
| SPAIN | Ratification | 29/08/1932 | |
| St Christopher, Nevis and Anguilla | Extension | 29/05/1963 | |
| St Helena | Extension | 05/10/1962 | |
| St Lucia | Extension | 04/06/1962 | |
| St Pierre and Miquelon | Extension | 08/07/1958 | |
| St Vincent | Extension | 04/06/1962 | |
| ST VINCENT AND THE GRENADINES | Ratification | 21/10/1998 | 31/05/1995 |
| Surinam | Extension | 05/08/1957 | |
| SURINAME | Succession | 15/06/1976 | |
| Swaziland | Extension | 18/02/1963 | |
| SWAZILAND | Succession | 26/04/1978 | |
| SWEDEN | Ratification | 27/11/1923 | |
| SWITZERLAND | Ratification | 23/05/1940 | |
| SYRIA | Ratification | 30/10/1961 | |
| TAJIKISTAN | Succession | 26/11/1993 | 26/11/1993 |
| Tanganyika | Extension | 19/11/1962 | |
| The Gambia | Extension | 05/10/1962 | |
| TOGO | Ratification | 07/06/1960 | |
| TUNISIA | Ratification | 15/05/1957 | |
| TURKEY | Ratification | 29/03/1961 | |
| Uganda | Extension | 04/06/1962 | |
| UGANDA | Succession | 04/06/1963 | |
| UKRAINE | Ratification | 14/09/1956 | |
| UNITED KINGDOM | Ratification | 06/08/1923 | |
| UPPER VOLTA | Ratification | 21/11/1960 | |
| URUGUAY | Ratification | 06/06/1933 | |
| VENEZUELA | Ratification | 20/11/1944 | |
| YUGOSLAVIA | Ratification | 30/09/1929 | |
| YUGOSLAVIA, FEDERAL REPUBLIC OF | Ratification | 24/11/2000 | 24/11/2000 |
| ZAMBIA | Ratification | 02/12/1964 | |
| Zanzibar | Extension | 04/06/1962 | |