| Country | Action | Action Date | Effective Date |
|---|
| ALGERIA | Accession | 19/12/1966 | 19/03/1967 |
| ALGERIA | Withdrawal | 02/01/1992 | 02/01/1993 |
| AUSTRALIA | Accession | 18/04/1973 | 18/07/1973 |
| AUSTRALIA | Withdrawal | 16/10/1987 | 16/10/1988 |
| AUSTRIA | Accession | 22/08/1958 | 11/09/1959 |
| AUSTRIA | Withdrawal | 30/09/1987 | 30/09/1988 |
| BANGLADESH | Accession | 01/07/1978 | 01/10/1978 |
| BELGIUM | Signature | 15/12/1950 | |
| BELGIUM | Ratification | 26/01/1960 | 26/04/1960 |
| BELGIUM | Withdrawal | 15/12/1987 | 15/12/1988 |
| BOTSWANA | Accession | 25/08/1978 | 25/11/1978 |
| BOTSWANA | Withdrawal | 07/07/1989 | 07/07/1990 |
| CYPRUS | Accession | 24/11/1972 | 24/11/1973 |
| CYPRUS | Withdrawal | 30/03/1994 | 30/03/1995 |
| CZECHOSLOVAKIA | Accession | 06/04/1982 | 06/07/1982 |
| CZECHOSLOVAKIA | Withdrawal | 16/03/1989 | 16/03/1990 |
| DENMARK | Ratification | 06/03/1959 | 11/09/1959 |
| DENMARK | Withdrawal | 13/10/1988 | 13/10/1989 |
| FINLAND | Accession | 27/01/1961 | 27/04/1961 |
| FINLAND | Withdrawal | 29/09/1987 | 29/09/1988 |
| FRANCE | Signature | 22/12/1950 | |
| FRANCE | Ratification | 21/06/1954 | 11/09/1959 |
| FRANCE | Withdrawal | 22/01/1988 | 22/01/1989 |
| GERMANY FEDERAL REPUBLIC | Ratification | 22/02/1960 | 22/05/1960 |
| GERMANY FEDERAL REPUBLIC | Withdrawal | 27/12/1988 | 27/12/1989 |
| GREECE | Signature | 09/01/1951 | |
| GREECE | Ratification | 10/12/1951 | 18/08/1965 |
| GREECE | Withdrawal | 31/12/1988 | 31/12/1989 |
| Guernsey, Bailiwick of | Extension | 30/09/1958 | |
| HAITI | Accession | 31/01/1958 | 11/09/1959 |
| HUNGARY | Accession | 09/03/1978 | 09/06/1978 |
| HUNGARY | Declaration | 09/03/1978 | |
| HUNGARY | Withdrawal | 13/12/1992 | 13/12/1993 |
| ICELAND | Signature | 20/12/1950 | |
| IRAN | Accession | 16/10/1959 | 16/01/1960 |
| IRAN | Denunciation | 24/06/2003 | 24/06/2004 |
| IRELAND, REPUBLIC OF | Accession | 22/01/1963 | 22/04/1963 |
| IRELAND, REPUBLIC OF | Withdrawal | 13/10/1988 | 13/10/1989 |
| Isle of Man | Extension | 30/09/1958 | |
| ISRAEL | Accession | 10/07/1970 | 10/10/1970 |
| ISRAEL | Withdrawal | 09/12/1987 | 09/12/1988 |
| ITALY | Signature | 10/01/1951 | |
| ITALY | Ratification | 23/12/1958 | 11/09/1959 |
| ITALY | Withdrawal | 03/12/1992 | 03/12/1993 |
| IVORY COAST | Accession | 08/12/1970 | 08/03/1971 |
| IVORY COAST | Withdrawal | 07/09/1992 | 07/09/1993 |
| JAPAN | Accession | 01/07/1966 | 01/10/1966 |
| JAPAN | Withdrawal | 21/03/1988 | 21/03/1989 |
| Jersey | Extension | 30/09/1958 | |
| KENYA | Accession | 13/03/1967 | 13/06/1967 |
| KENYA | Withdrawal | 20/08/1992 | 20/08/1993 |
| KOREA REPUBLIC OF | Accession | 02/07/1968 | 02/10/1968 |
| KOREA REPUBLIC OF | Withdrawal | 05/01/1988 | 05/01/1989 |
| Land Berlin | Extension | 03/10/1960 | 22/05/1960 |
| LEBANON | Accession | 10/12/1981 | 10/03/1982 |
| LEBANON | Denunciation | 16/12/2002 | 16/12/2003 |
| LESOTHO | Accession | 11/09/1980 | 11/12/1980 |
| LESOTHO | Withdrawal | 09/09/1988 | 09/09/1989 |
| LUXEMBOURG | Signature | 08/01/1951 | |
| LUXEMBOURG | Ratification | 26/01/1960 | 26/04/1960 |
| LUXEMBOURG | Withdrawal | 02/05/1988 | 02/05/1989 |
| MALAYSIA | Accession | 30/03/1979 | 30/06/1979 |
| MALAYSIA | Withdrawal | 22/12/1987 | 22/12/1988 |
| MAURITANIA | Accession | 02/10/1979 | 02/01/1980 |
| MAURITIUS | Accession | 06/07/1981 | 06/10/1981 |
| MAURITIUS | Withdrawal | 30/08/1988 | 30/08/1989 |
| MOROCCO | Accession | 01/07/1968 | 01/10/1968 |
| MOROCCO | Denunciation | 21/10/2002 | 21/10/2003 |
| NETHERLANDS THE | Signature | 29/12/1950 | |
| NETHERLANDS THE | Ratification | 31/12/1959 | 31/03/1960 |
| NETHERLANDS THE | Withdrawal | 30/09/1987 | 30/09/1988 |
| NEW ZEALAND | Accession | 24/08/1967 | 24/11/1967 |
| NEW ZEALAND | Withdrawal | 04/12/1987 | 04/12/1988 |
| NIGERIA | Accession | 12/10/1972 | 12/01/1973 |
| NIGERIA | Withdrawal | 25/08/1989 | 25/08/1990 |
| NORWAY | Signature | 28/03/1951 | |
| NORWAY | Ratification | 11/06/1959 | 11/09/1959 |
| NORWAY | Withdrawal | 05/01/1988 | 05/01/1989 |
| PAKISTAN | Accession | 14/11/1980 | 14/02/1981 |
| PAKISTAN | Withdrawal | 12/05/1989 | 12/05/1990 |
| PORTUGAL | Signature | 29/03/1951 | |
| PORTUGAL | Ratification | 10/06/1960 | 10/09/1960 |
| PORTUGAL | Withdrawal | 16/03/1989 | 16/03/1990 |
| RWANDA | Ratification | 01/05/1965 | 01/08/1965 |
| RWANDA | Withdrawal | 15/09/1992 | 15/09/1993 |
| SAUDI ARABIA | Accession | 15/01/1982 | 15/04/1982 |
| SAUDI ARABIA | Withdrawal | 05/05/1990 | 05/05/1991 |
| SENEGAL | Accession | 16/10/1978 | 16/01/1979 |
| SENEGAL | Withdrawal | 30/08/1989 | 30/08/1990 |
| SOUTH AFRICA | Accession | 06/08/1970 | 06/11/1970 |
| SOUTH AFRICA | Withdrawal | 06/07/1988 | 06/07/1989 |
| SPAIN | Accession | 12/06/1961 | 12/09/1961 |
| SPAIN | Withdrawal | 13/03/1989 | 13/03/1990 |
| SWAZILAND | Accession | 15/05/1981 | 15/08/1981 |
| SWAZILAND | Withdrawal | 05/01/1988 | 05/01/1989 |
| SWEDEN | Ratification | 16/10/1958 | 11/09/1959 |
| SWEDEN | Withdrawal | 23/12/1986 | 23/12/1987 |
| SWITZERLAND | Accession | 28/12/1959 | 08/03/1960 |
| SWITZERLAND | Withdrawal | 31/12/1987 | 31/12/1988 |
| TANZANIA | Accession | 23/06/1970 | 23/09/1970 |
| TUNISIA | Accession | 20/07/1966 | 20/10/1966 |
| TUNISIA | Withdrawal | 21/05/1987 | 21/05/1988 |
| TURKEY | Accession | 06/06/1951 | 11/09/1959 |
| TURKEY | Withdrawal | 01/01/1989 | 01/01/1990 |
| UGANDA | Accession | 27/11/1967 | 27/02/1968 |
| UNITED KINGDOM | Signature | 21/02/1951 | |
| UNITED KINGDOM | Ratification | 30/09/1958 | 11/09/1959 |
| UNITED KINGDOM | Withdrawal | 19/04/1988 | 19/04/1989 |
| UPPER VOLTA | Accession | 15/06/1978 | 15/09/1978 |
| YUGOSLAVIA | Accession | 03/10/1962 | 03/01/1963 |
| YUGOSLAVIA | Withdrawal | 11/05/1987 | 11/05/1988 |
| ZAIRE | Accession | 13/02/1975 | 13/05/1975 |
| ZIMBABWE | Accession | 02/08/1983 | 02/11/1983 |
| ZIMBABWE | Withdrawal | 26/10/1987 | 26/10/1988 |