| Country | Action | Action Date | Effective Date |
|---|
| AFGHANISTAN | Ratification | 22/08/1969 | |
| ALBANIA | Ratification | 03/06/1957 | |
| ALGERIA | Ratification | 19/10/1962 | |
| ANGOLA | Succession | 04/06/1976 | |
| ANTIGUA AND BARBUDA | Ratification | 02/05/2003 | 02/05/2004 |
| ARGENTINA | Ratification | 24/09/1956 | |
| ARMENIA | Ratification | 29/07/1994 | 29/07/1995 |
| AUSTRALIA | Ratification | 10/12/1974 | 10/12/1975 |
| AUSTRALIA | Declaration | 08/02/1996 | 08/02/1996 |
| AUSTRIA | Ratification | 29/10/1953 | |
| AZERBAIJAN | Ratification | 19/05/1992 | 19/05/1992 |
| BAHAMAS | Ratification | 14/06/2001 | 14/06/2002 |
| BARBADOS | Ratification | 19/09/1974 | 19/09/1975 |
| BELGIUM | Ratification | 23/05/1952 | |
| BELIZE | Ratification | 22/06/1999 | 22/06/2000 |
| BENIN | Ratification | 16/05/1968 | |
| BOLIVIA | Ratification | 15/11/1973 | 15/11/1974 |
| BOSNIA AND HERZEGOVINA | Ratification | 02/06/1993 | 02/06/1993 |
| BRAZIL | Ratification | 25/04/1957 | |
| BULGARIA | Ratification | 07/11/1955 | |
| BYELORUSSIA S S R | Ratification | 21/08/1956 | |
| CAMBODIA | Ratification | 23/08/1999 | 23/08/2000 |
| CAMEROON | Ratification | 25/05/1970 | |
| CANADA | Ratification | 16/11/1972 | |
| CAPE VERDE | Succession | 16/10/1979 | |
| CENTRAL AFRICAN REPUBLIC | Ratification | 09/06/1964 | |
| CHAD | Ratification | 29/03/1966 | |
| CHILE | Ratification | 20/09/1971 | |
| CHINA | Declaration | 11/06/1984 | |
| CHINA | Signature | 02/11/1990 | |
| CHINA | Ratification | 02/11/1990 | 01/11/1991 |
| CHINA | Declaration | 20/10/1999 | |
| COLOMBIA | Ratification | 07/06/1963 | |
| Comoro Islands | Extension | 27/11/1974 | |
| COMOROS ISLANDS | Succession | 23/10/1978 | 23/10/1978 |
| CONGO, DEMOCRATIC REPUBLIC OF | Ratification | 16/06/1969 | |
| CONGO, REPUBLIC OF | Ratification | 26/11/1999 | 26/11/2000 |
| COSTA RICA | Ratification | 02/06/1960 | |
| COTE D'IVOIRE | Ratification | 05/05/1961 | |
| CUBA | Ratification | 13/01/1954 | |
| CYPRUS | Ratification | 19/11/1987 | 19/11/1988 |
| CZECH REPUBLIC | Succession | 01/01/1993 | 01/01/1993 |
| CZECHOSLOVAKIA | Ratification | 30/10/1957 | |
| DENMARK | Ratification | 22/06/1960 | |
| DJIBOUTI | Succession | 03/08/1978 | 03/08/1978 |
| DOMINICA, COMMONWEALTH OF | Ratification | 28/02/1983 | 28/02/1984 |
| DOMINICAN REPUBLIC | Ratification | 22/09/1953 | |
| ECUADOR | Ratification | 11/03/1957 | |
| EGYPT | Ratification | 26/07/1960 | |
| EQUATORIAL GUINEA | Accession | 12/06/1985 | 12/06/1986 |
| ERITREA | Ratification | 22/02/2000 | 22/02/2001 |
| ETHIOPIA | Ratification | 24/03/1999 | 24/03/2000 |
| FIJI | Ratification | 17/04/2002 | 17/04/2003 |
| FINLAND | Ratification | 14/01/1963 | |
| FRANCE | Ratification | 10/03/1953 | |
| French Polynesia | Extension | 27/11/1974 | |
| French Terr Of Afars And Issas | Extension | 27/11/1974 | |
| GABON | Ratification | 13/06/1961 | |
| GERMAN DEMOCRATIC REPUBLIC | Ratification | 07/05/1975 | 07/05/1976 |
| GERMAN DEMOCRATIC REPUBLIC | Statement | 07/05/1975 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 08/06/1956 | |
| GHANA | Ratification | 14/03/1968 | |
| Gibraltar | Extension | 03/05/1978 | 01/01/1900 |
| GREECE | Ratification | 06/06/1975 | 06/06/1976 |
| GRENADA | Ratification | 25/10/1994 | 25/10/1995 |
| GUATEMALA | Ratification | 02/08/1961 | |
| GUINEA | Ratification | 11/08/1967 | |
| GUINEA BISSAU | Succession | 21/02/1977 | |
| GUYANA | Ratification | 13/06/1975 | 13/06/1976 |
| HAITI | Ratification | 04/03/1958 | |
| HONDURAS | Ratification | 09/08/1956 | |
| HUNGARY | Ratification | 08/06/1956 | |
| ICELAND | Ratification | 17/02/1958 | |
| INDIA | Ratification | 25/09/1958 | |
| INDONESIA | Ratification | 11/08/1958 | |
| IRAN | Ratification | 10/06/1972 | |
| IRAQ | Ratification | 28/08/1963 | |
| IRELAND, REPUBLIC OF | Ratification | 18/12/1974 | 18/12/1975 |
| Isle of Man | Extension | 03/12/2021 | |
| ISRAEL | Ratification | 09/06/1965 | |
| ITALY | Ratification | 08/06/1956 | |
| JAMAICA | Ratification | 14/01/1975 | 14/01/1976 |
| JAPAN | Signature | 24/08/1967 | |
| JORDAN | Ratification | 22/09/1966 | |
| KAZAKHSTAN | Ratification | 18/05/2001 | 18/05/2002 |
| KENYA | Ratification | 07/05/2001 | 07/05/2002 |
| KYRGYZSTAN | Ratification | 31/03/1992 | 31/03/1992 |
| LATVIA | Accession | 27/01/1992 | 27/01/1993 |
| LEBANON | Ratification | 01/06/1977 | 01/06/1978 |
| LIBYA | Ratification | 20/06/1962 | |
| LITHUANIA | Ratification | 26/09/1994 | 26/09/1995 |
| LUXEMBOURG | Signature | 23/08/1967 | |
| MADAGASCAR | Ratification | 10/08/1962 | |
| MALAWI | Ratification | 22/03/1964 | |
| MALI | Ratification | 12/07/1968 | |
| MALTA | Ratification | 09/06/1988 | 09/06/1989 |
| MAURITANIA | Ratification | 03/12/2001 | 03/12/2002 |
| MAURITIUS | Ratification | 18/12/2002 | 18/12/2003 |
| MEXICO | Ratification | 23/08/1952 | |
| MOLDOVA REPUBLIC OF | Ratification | 23/03/2000 | 23/03/2001 |
| MONGOLIA | Ratification | 03/06/1969 | |
| MOROCCO | Ratification | 11/05/1979 | 11/05/1980 |
| MOZAMBIQUE | Ratification | 06/06/1977 | |
| NEPAL | Ratification | 10/06/1976 | 10/06/1977 |
| NETHERLANDS THE | Ratification | 16/06/1971 | |
| New Caledonia | Extension | 27/11/1974 | |
| NEW ZEALAND | Ratification | 03/06/1983 | 03/06/1984 |
| NEW ZEALAND | Declaration | 03/06/1983 | 03/06/1984 |
| NICARAGUA | Ratification | 31/10/1967 | |
| NIGER | Ratification | 09/08/1966 | |
| NIGERIA | Ratification | 08/05/1974 | 08/05/1975 |
| NORWAY | Ratification | 24/09/1959 | |
| PAKISTAN | Ratification | 11/10/2001 | 11/10/2002 |
| PANAMA | Ratification | 03/06/1958 | |
| PAPUA NEW GUINEA | Ratification | 02/06/2000 | 02/06/2001 |
| PARAGUAY | Ratification | 24/06/1964 | |
| PERU | Ratification | 01/02/1960 | |
| PHILIPPINES | Ratification | 29/12/1953 | |
| POLAND | Ratification | 25/10/1954 | |
| PORTUGAL | Ratification | 20/02/1967 | |
| PORTUGAL | Declaration | 04/10/1999 | |
| ROMANIA | Ratification | 28/05/1957 | |
| RWANDA | Ratification | 02/12/1980 | 02/12/1981 |
| SAINT LUCIA | Ratification | 18/08/1983 | 18/08/1984 |
| SAN MARINO | Accession | 23/05/1985 | 23/05/1986 |
| SAO TOME AND PRINCIPE | Ratification | 01/06/1982 | 01/06/1982 |
| SAUDI ARABIA | Ratification | 15/06/1978 | 15/06/1979 |
| SENEGAL | Ratification | 22/10/1962 | |
| SEYCHELLES | Ratification | 23/11/1999 | 23/11/2000 |
| SIERRA LEONE | Ratification | 15/11/1968 | |
| SINGAPORE | Ratification | 30/05/2002 | 30/05/2003 |
| SLOVAK REPUBLIC | Succession | 01/01/1993 | 01/01/1993 |
| SLOVENIA | Accession | 09/06/1992 | 09/06/1992 |
| SOUTH AFRICA | Ratification | 30/03/2000 | 30/03/2001 |
| SOVIET UNION | Ratification | 30/04/1956 | |
| SPAIN | Ratification | 06/11/1967 | |
| SRI LANKA | Ratification | 01/04/1993 | 01/04/1994 |
| ST KITTS AND NEVIS | Ratification | 25/08/2000 | 25/08/2001 |
| St Pierre and Miquelon | Extension | 27/11/1974 | |
| ST VINCENT AND THE GRENADINES | Ratification | 04/12/2001 | 04/12/2002 |
| SUDAN | Ratification | 22/10/1970 | |
| SWAZILAND | Ratification | 05/06/1981 | 05/06/1982 |
| SWEDEN | Ratification | 20/06/1962 | |
| SWITZERLAND | Ratification | 25/10/1972 | |
| SYRIA | Ratification | 07/06/1957 | |
| TAIWAN | Ratification | 01/05/1958 | |
| TAJIKISTAN | Ratification | 26/11/1993 | 26/11/1993 |
| TANZANIA | Ratification | 26/02/2002 | 26/02/2003 |
| THAILAND | Ratification | 08/02/1999 | 08/02/2000 |
| TOGO | Ratification | 08/11/1983 | 08/11/1984 |
| Tokelau Islands | Extension | 03/06/1983 | 03/06/1984 |
| TUNISIA | Ratification | 11/10/1968 | |
| TURKEY | Ratification | 19/07/1967 | |
| UKRAINE S S R | Ratification | 10/08/1956 | |
| UNITED KINGDOM | Ratification | 15/06/1971 | |
| UPPER VOLTA | Ratification | 30/06/1969 | |
| URUGUAY | Ratification | 16/11/1989 | 16/11/1990 |
| VENEZUELA | Accession | 10/08/1982 | |
| YEMEN ARAB REPUBLIC | Ratification | 29/07/1976 | 29/07/1977 |
| YUGOSLAVIA | Ratification | 21/05/1962 | |
| YUGOSLAVIA, FEDERAL REPUBLIC OF | Ratification | 24/11/2000 | 24/11/2000 |
| ZAMBIA | Ratification | 20/06/1972 | |
| ZIMBABWE | Ratification | 14/12/1989 | 14/12/1990 |