| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| BULGARIA | Adherence | 21/08/1972 | |
| CANADA | Signature | 10/10/1969 | |
| CANADA | Ratification | 29/10/1970 | |
| CUBA | Adherence | 28/11/1975 | |
| DENMARK | Signature | 15/10/1969 | |
| DENMARK | Approval | 18/08/1970 | |
| DENMARK | Extension | 18/08/1970 | |
| Faroe Islands | Extension | 18/08/1979 | |
| FRANCE | Signature | 13/10/1969 | |
| FRANCE | Approval | 23/12/1970 | |
| GERMAN DEMOCRATIC REPUBLIC | Adherence | 21/05/1974 | |
| GERMANY FEDERAL REPUBLIC | Signature | 03/10/1969 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 15/12/1971 | |
| GERMANY FEDERAL REPUBLIC | Extension | 15/12/1971 | |
| ICELAND | Adherence | 14/11/1969 | |
| ITALY | Signature | 14/10/1969 | |
| ITALY | Ratification | 18/11/1971 | |
| JAPAN | Adherence | 01/07/1970 | |
| Land Berlin | Extension | 15/12/1971 | |
| NORWAY | Signature | 14/10/1969 | |
| NORWAY | Ratification | 10/07/1970 | |
| POLAND | Signature | 14/10/1969 | |
| POLAND | Ratification | 30/11/1971 | |
| PORTUGAL | Adherence | 19/10/1971 | |
| ROMANIA | Adherence | 10/04/1970 | |
| SOVIET UNION | Adherence | 21/11/1969 | |
| SPAIN | Signature | 15/10/1969 | |
| SPAIN | Ratification | 03/03/1971 | |
| UNITED KINGDOM | Signature | 06/10/1969 | |
| UNITED KINGDOM | Ratification | 12/01/1971 | |
| UNITED KINGDOM | Approval | 12/01/1971 | |
| UNITED STATES OF AMERICA | Signature | 10/10/1969 | |
| UNITED STATES OF AMERICA | Ratification | 17/04/1970 |