| Country | Action | Action Date | Effective Date |
|---|
| ALGERIA | Accession | 30/10/1969 | |
| AUSTRIA | Signature | 26/02/1966 | |
| AUSTRIA | Ratification | 02/07/1969 | |
| BELGIUM | Signature | 26/02/1966 | |
| BELGIUM | Ratification | 14/10/1968 | |
| BULGARIA | Signature | 26/02/1966 | |
| BULGARIA | Ratification | 21/10/1971 | |
| CZECHOSLOVAKIA | Signature | 26/02/1966 | |
| CZECHOSLOVAKIA | Ratification | 14/11/1996 | |
| DENMARK | Signature | 26/02/1966 | |
| DENMARK | Ratification | 23/02/1967 | |
| FINLAND | Signature | 26/02/1966 | |
| FINLAND | Ratification | 30/12/1970 | |
| FRANCE | Signature | 26/02/1966 | |
| FRANCE | Ratification | 11/03/1968 | |
| IRAQ | Accession | 02/06/1969 | |
| ITALY | Signature | 26/02/1966 | |
| LEBANON | Signature | 26/02/1966 | |
| LIECHTENSTEIN | Signature | 26/02/1966 | |
| LIECHTENSTEIN | Ratification | 05/10/1967 | |
| LUXEMBOURG | Signature | 26/02/1966 | |
| LUXEMBOURG | Ratification | 20/05/1970 | |
| MOROCCO | Signature | 26/02/1966 | |
| MOROCCO | Ratification | 28/06/1973 | 01/09/1973 |
| NETHERLANDS THE | Signature | 26/02/1966 | |
| NETHERLANDS THE | Ratification | 09/05/1967 | |
| NORWAY | Signature | 26/02/1966 | |
| NORWAY | Ratification | 16/08/1971 | |
| POLAND | Signature | 26/02/1966 | |
| POLAND | Ratification | 25/02/1971 | |
| PORTUGAL | Signature | 26/02/1966 | |
| PORTUGAL | Ratification | 20/10/1971 | |
| ROMANIA | Signature | 26/02/1966 | |
| SPAIN | Signature | 26/02/1966 | |
| SPAIN | Ratification | 04/08/1967 | |
| SWITZERLAND | Signature | 26/02/1966 | |
| SWITZERLAND | Ratification | 21/01/1969 | |
| SYRIA | Signature | 26/02/1966 | |
| SYRIA | Ratification | 10/01/1972 | |
| TUNISIA | Signature | 26/02/1966 | |
| TURKEY | Signature | 26/02/1966 | |
| TURKEY | Ratification | 07/05/1971 | |
| UNITED KINGDOM | Accession | 17/11/1972 | 01/01/1973 |
| YUGOSLAVIA | Signature | 26/02/1966 | |
| YUGOSLAVIA | Ratification | 17/07/1967 | |