| Country | Action | Action Date | Effective Date |
|---|
| ALGERIA | Accession | 18/08/1977 | 18/11/1977 |
| AUSTRIA | Accession | 04/11/1955 | 04/01/1956 |
| AUSTRIA | Withdrawal | 26/03/1980 | 26/03/1981 |
| BELGIUM | Signature | 15/12/1950 | |
| BELGIUM | Ratification | 03/01/1953 | 28/07/1953 |
| BELGIUM | Withdrawal | 30/06/1979 | 30/06/1980 |
| CHAD | | | |
| CYPRUS | Accession | 24/11/1972 | 24/02/1973 |
| CYPRUS | Withdrawal | 06/10/1989 | 06/10/1990 |
| DENMARK | Accession | 06/03/1959 | 06/06/1959 |
| DENMARK | Withdrawal | 30/06/1979 | 30/06/1980 |
| FINLAND | Accession | 26/10/1966 | 26/01/1967 |
| FINLAND | Withdrawal | 21/12/1979 | 21/12/1980 |
| FRANCE | Signature | 22/12/1950 | |
| FRANCE | Ratification | 27/04/1953 | 28/07/1953 |
| FRANCE | Withdrawal | 30/06/1979 | 30/06/1980 |
| GERMANY FEDERAL REPUBLIC | Accession | 04/11/1952 | 28/07/1953 |
| GERMANY FEDERAL REPUBLIC | Declaration | 05/01/1954 | |
| GERMANY FEDERAL REPUBLIC | Withdrawal | 30/06/1979 | 30/06/1980 |
| GREECE | Signature | 09/01/1951 | |
| GREECE | Ratification | 10/12/1951 | 28/07/1953 |
| GREECE | Withdrawal | 11/03/1980 | 11/03/1981 |
| HAITI | Accession | 31/01/1958 | 30/04/1958 |
| ICELAND | Signature | 20/12/1950 | |
| IRELAND, REPUBLIC OF | Accession | 23/09/1952 | 23/07/1953 |
| IRELAND, REPUBLIC OF | Withdrawal | 30/06/1979 | 30/06/1980 |
| Isle of Man | Extension | 27/09/1952 | 28/07/1953 |
| Isle of Man | Withdrawal | 30/06/1979 | 30/06/1980 |
| ISRAEL | Accession | 26/02/1981 | 26/05/1981 |
| ITALY | Signature | 10/01/1951 | |
| ITALY | Ratification | 17/06/1953 | 17/09/1953 |
| ITALY | Withdrawal | 30/06/1979 | 30/06/1980 |
| IVORY COAST | Accession | 08/12/1970 | 08/03/1971 |
| IVORY COAST | Withdrawal | 28/06/1993 | 28/06/1994 |
| JAPAN | Accession | 01/06/1972 | 01/09/1972 |
| JAPAN | Withdrawal | 14/12/1979 | 14/12/1980 |
| KENYA | Accession | 13/03/1967 | 13/06/1967 |
| KOREA | Accession | 02/07/1968 | |
| KOREA | Withdrawal | 28/04/1981 | 24/04/1982 |
| Land Berlin | Extension | 05/01/1954 | 05/04/1954 |
| Land Berlin | Withdrawal | 30/06/1979 | 30/06/1980 |
| LUXEMBOURG | Signature | 08/01/1951 | |
| LUXEMBOURG | Ratification | 23/01/1953 | 28/07/1953 |
| LUXEMBOURG | Withdrawal | 30/06/1979 | 30/06/1980 |
| NETHERLANDS THE | Signature | 29/12/1950 | |
| NETHERLANDS THE | Ratification | 23/01/1953 | 28/07/1953 |
| NETHERLANDS THE | Withdrawal | 30/06/1979 | 30/06/1980 |
| NIGERIA | Accession | 12/10/1972 | 12/01/1973 |
| NIGERIA | Withdrawal | 25/09/1997 | 25/09/1998 |
| NORWAY | Signature | 28/03/1951 | |
| NORWAY | Ratification | 27/03/1963 | 27/06/1963 |
| NORWAY | Withdrawal | 21/12/1979 | 21/12/1980 |
| PAKISTAN | Accession | 14/10/1957 | 14/01/1957 |
| PORTUGAL | Signature | 29/03/1951 | |
| PORTUGAL | Ratification | 11/06/1953 | 11/09/1953 |
| PORTUGAL | Withdrawal | 24/07/1981 | 24/07/1982 |
| RWANDA | Accession | 01/06/1964 | 01/09/1964 |
| SENEGAL | Accession | 16/10/1978 | 16/01/1979 |
| SPAIN | Accession | 23/04/1971 | 23/07/1971 |
| SPAIN | Withdrawal | 28/05/1982 | 28/05/1983 |
| SWEDEN | Accession | 11/08/1960 | 11/11/1960 |
| SWEDEN | Withdrawal | 24/12/1979 | 24/12/1980 |
| TANZANIA | Accession | 09/12/1977 | 09/03/1978 |
| TUNISIA | Accession | 20/07/1966 | 20/10/1966 |
| TUNISIA | Withdrawal | 03/11/1986 | 03/11/1987 |
| TURKEY | Accession | 06/06/1951 | 28/07/1953 |
| TURKEY | Withdrawal | 11/02/1986 | 11/02/1987 |
| UGANDA | Accession | 03/01/1972 | 03/04/1972 |
| UGANDA | Denunciation | 18/04/2001 | 18/04/2002 |
| UNITED KINGDOM | Signature | 21/02/1951 | |
| UNITED KINGDOM | Ratification | 27/09/1952 | |
| UNITED KINGDOM | Ratification | 27/09/1952 | 28/07/1953 |
| UNITED KINGDOM | Withdrawal | 30/06/1979 | 30/06/1980 |
| YUGOSLAVIA | Accession | 03/10/1962 | 03/01/1963 |
| YUGOSLAVIA | Withdrawal | 26/03/1981 | 12/03/1982 |
| ZAIRE | Accession | 13/02/1975 | 13/05/1975 |
| ZAIRE | Denunciation | 05/07/2000 | 05/07/2001 |