| Country | Action | Action Date | Effective Date |
|---|
| ALBANIA | Acceptance | 10/04/1980 | |
| BELGIUM | Acceptance | 08/03/1977 | |
| BULGARIA | Acceptance | 10/03/1979 | |
| BYELORUSSIA S S R | Acceptance | 10/06/1979 | |
| CZECHOSLOVAKIA | Acceptance | 11/07/1978 | |
| DENMARK | Acceptance | 10/08/1979 | |
| FINLAND | Acceptance | 10/11/1978 | |
| FRANCE | Acceptance | 10/11/1978 | |
| GREECE | Acceptance | 27/11/1985 | |
| HUNGARY | Acceptance | 09/09/1977 | |
| IRELAND, REPUBLIC OF | Acceptance | 10/03/1979 | |
| ITALY | Acceptance | 10/08/1979 | |
| MONACO | Acceptance | 10/03/1979 | |
| MOROCCO | Acceptance | 10/08/1979 | |
| NETHERLANDS THE | Acceptance | 10/11/1978 | |
| NORWAY | Acceptance | 11/04/1977 | |
| POLAND | Acceptance | 10/03/1979 | |
| ROMANIA | Acceptance | 10/06/1979 | |
| SOVIET UNION | Acceptance | 10/03/1979 | |
| SWITZERLAND | Acceptance | 10/08/1979 | |
| TUNISIA | Acceptance | 10/11/1979 | |
| UKRAINE S S R | Acceptance | 10/08/1979 | |
| UNITED KINGDOM | Acceptance | 29/09/1978 | |
| VATICAN CITY | Acceptance | 26/06/1978 | |
| YUGOSLAVIA | Acceptance | 10/08/1979 | |