| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| BELGIUM | Definitive Signature | 21/06/1963 | |
| FRANCE | Definitive Signature | 21/06/1963 | |
| GERMANY FEDERAL REPUBLIC | Definitive Signature | 21/06/1963 | |
| NETHERLANDS THE | Definitive Signature | 21/06/1963 | |
| SPAIN | Definitive Signature | 21/06/1963 | |
| SWEDEN | Signature | 13/08/1963 | |
| SWITZERLAND | Definitive Signature | 21/06/1963 | |
| UNITED KINGDOM | Signature | 21/06/1963 | |
| UNITED KINGDOM | Definitive Signature | 21/06/1963 |