| Country | Action | Action Date | Effective Date |
|---|
| ALBANIA | Acceptance | 25/11/1986 | 25/11/1986 |
| AUSTRIA | Acceptance | 01/12/1955 | |
| BELGIUM | Acceptance | 24/09/1959 | |
| BULGARIA | Acceptance | 02/11/1971 | |
| CYPRUS | Acceptance | 11/01/1971 | |
| CZECHOSLOVAKIA | Acceptance | 01/01/1986 | 01/01/1986 |
| DENMARK | Acceptance | 04/02/1954 | |
| FINLAND | Acceptance | 05/03/1968 | |
| FRANCE | Acceptance | 28/02/1984 | |
| GERMANY FEDERAL REPUBLIC | Acceptance | 26/03/1973 | |
| GERMANY FEDERAL REPUBLIC | Declaration | 26/03/1973 | |
| GREECE | Acceptance | 23/03/1959 | |
| HUNGARY | Acceptance | 07/04/1970 | |
| ICELAND | Acceptance | 17/01/1955 | |
| IRELAND, REPUBLIC OF | Acceptance | 16/12/1953 | |
| ITALY | Acceptance | 29/09/1955 | |
| LUXEMBOURG | Acceptance | 01/06/1969 | |
| MALTA | Acceptance | 13/03/1970 | |
| NETHERLANDS THE | Acceptance | 12/06/1954 | |
| NORWAY | Acceptance | 11/12/1953 | |
| POLAND | Acceptance | 04/01/1984 | 04/01/1984 |
| PORTUGAL | Acceptance | 06/10/1955 | |
| SPAIN | Acceptance | 20/12/1978 | |
| SWEDEN | Acceptance | 13/12/1963 | |
| SWITZERLAND | Acceptance | 23/02/1961 | |
| TURKEY | Acceptance | 27/09/1955 | |
| UNITED KINGDOM | Ratification | 01/03/1954 | |
| UNITED KINGDOM | Acceptance | 01/03/1954 | |
| YUGOSLAVIA | Acceptance | 14/12/1953 | |