| Country | Action | Action Date | Effective Date |
|---|
| ALGERIA | Accession | 03/11/1988 | 03/02/1989 |
| ALGERIA | Reservation | 03/11/1988 | |
| Aruba | Extension | 01/01/1986 | |
| AUSTRIA | Signature | 07/12/1960 | |
| AUSTRIA | Ratification | 09/03/1962 | |
| BELGIUM | Signature | 06/10/1960 | |
| BELGIUM | Ratification | 27/06/1963 | |
| BULGARIA | Accession | 05/08/1969 | |
| CAMBODIA | Accession | 20/02/1963 | |
| CENTRAL AFRICAN REPUBLIC | Accession | 23/02/1962 | |
| CROATIA | Accession | 29/09/1994 | 29/12/1994 |
| CUBA | Signature | 28/03/1961 | |
| CUBA | Ratification | 31/10/1963 | |
| CUBA | Reservation | 31/10/1963 | |
| CZECHOSLOVAKIA | Accession | 04/05/1962 | |
| DENMARK | Accession | 15/12/1961 | |
| EGYPT | Accession | 25/03/1963 | |
| FINLAND | Accession | 23/04/1965 | |
| FRANCE | Definitive Signature | 26/01/1961 | |
| GERMANY FEDERAL REPUBLIC | Signature | 07/12/1960 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 11/07/1969 | |
| GERMANY FEDERAL REPUBLIC | Declaration | 11/07/1969 | |
| Gibraltar | Extension | 01/04/1977 | 01/07/1977 |
| Gilbert Islands | Extension | 01/04/1977 | 01/07/1977 |
| Guernsey, Bailiwick of | Extension | 18/10/1978 | 18/01/1979 |
| IRAN | Accession | 16/04/1968 | |
| IRELAND, REPUBLIC OF | Accession | 15/09/1965 | |
| Isle of Man | Extension | 18/10/1978 | 18/01/1979 |
| ISRAEL | Accession | 02/06/1961 | |
| ISRAEL | Declaration | 02/06/1961 | |
| ITALY | Signature | 22/03/1961 | |
| ITALY | Ratification | 30/05/1963 | |
| Jersey, Bailiwick of | Extension | 18/10/1978 | 18/01/1979 |
| KENYA | Accession | 31/08/1983 | 01/12/1983 |
| KOREA REPUBLIC OF | Accession | 21/10/1975 | 21/01/1976 |
| Land Berlin | Extension | 11/07/1969 | |
| LESOTHO | Accession | 27/01/1982 | 27/04/1982 |
| LUXEMBOURG | Signature | 10/02/1961 | |
| LUXEMBOURG | Ratification | 12/05/1964 | |
| Montserrat | Extension | 01/04/1977 | 01/07/1977 |
| NETHERLANDS THE | Accession | 21/11/1962 | |
| NORWAY | Accession | 21/11/1961 | |
| POLAND | Accession | 29/06/1965 | |
| PORTUGAL | Accession | 23/05/1990 | 23/08/1990 |
| ROMANIA | Accession | 23/12/1966 | |
| ROMANIA | Declaration | 23/12/1966 | |
| SLOVAK REPUBLIC | Succession | | 05/02/1993 |
| SLOVENIA | Accession | 23/11/1992 | 23/02/1993 |
| SOUTH AFRICA | Accession | 11/10/1973 | |
| SOUTH AFRICA | Declaration | 11/10/1973 | |
| SPAIN | Accession | 08/01/1965 | |
| SPAIN | Declaration | 08/01/1965 | |
| St Helena | Extension | 01/04/1977 | 01/07/1977 |
| SWEDEN | Definitive Signature | 21/03/1961 | |
| SWITZERLAND | Signature | 06/03/1961 | |
| SWITZERLAND | Ratification | 30/04/1963 | |
| SWITZERLAND | Declaration | 30/04/1963 | |
| TURKEY | Signature | 31/03/1961 | |
| TURKEY | Ratification | 27/12/1965 | |
| UGANDA | Accession | 09/01/1970 | |
| UNITED KINGDOM | Accession | 01/04/1977 | 01/07/1977 |
| UNITED KINGDOM | Declaration | 01/04/1977 | |
| YUGOSLAVIA | Accession | 18/09/1962 | |
| ZIMBABWE | Accession | 18/02/1987 | 18/05/1987 |