| Country | Action | Action Date | Effective Date |
|---|
| BELGIUM | Signature | 30/04/1980 | |
| CYPRUS | Signature | 30/04/1980 | |
| DENMARK | Signature | 30/04/1980 | |
| FRANCE | Signature | 30/04/1980 | |
| GERMANY FEDERAL REPUBLIC | Signature | 30/04/1980 | |
| GREECE | Signature | 30/04/1980 | |
| IRELAND, REPUBLIC OF | Signature | 30/04/1980 | |
| ITALY | Signature | 30/04/1980 | |
| LIECHTENSTEIN | Signature | 30/04/1980 | |
| LUXEMBOURG | Signature | 30/04/1980 | |
| MALTA | Signature | 30/04/1980 | |
| NETHERLANDS THE | Signature | 30/04/1980 | |
| NORWAY | Signature | 30/04/1980 | |
| SWEDEN | Signature | 30/04/1980 | |
| SWITZERLAND | Signature | 30/04/1980 | |
| TURKEY | Signature | 30/04/1980 | |
| UNITED KINGDOM | Signature | 30/04/1980 | |