| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| ALBANIA | Accession | 04/06/2004 | 02/09/2004 |
| BELGIUM | Signature | 14/01/1958 | |
| BELGIUM | Ratification | 28/08/1958 | |
| BELGIUM | Reservation | 28/08/1958 | |
| BOSNIA AND HERZEGOVINA | Succession | 12/01/1994 | 06/03/1992 |
| BULGARIA | Accession | 14/03/1963 | |
| BULGARIA | Reservation | 14/03/1963 | |
| CYPRUS | Accession | 30/07/1973 | 28/10/1973 |
| CZECH REPUBLIC | Succession | 02/06/1993 | 01/01/1993 |
| CZECHOSLOVAKIA | Accession | 12/05/1960 | |
| CZECHOSLOVAKIA | Reservation | 12/05/1960 | |
| FRANCE | Definitive Signature | 04/02/1958 | |
| GERMANY FEDERAL REPUBLIC | Signature | 13/12/1957 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 03/01/1963 | |
| GHANA | Accession | 10/08/1960 | 08/11/1960 |
| HUNGARY | Accession | 30/07/1962 | |
| HUNGARY | Reservation | 30/07/1962 | |
| HUNGARY | Withdrawal Res. | 08/12/1989 | |
| HUNGARY | Withdrawal Dec. | 15/04/1991 | |
| ITALY | Signature | 13/02/1958 | |
| Land Berlin | Extension | 03/01/1963 | |
| LUXEMBOURG | Signature | 13/12/1957 | |
| LUXEMBOURG | Ratification | 28/06/1961 | |
| MONTENEGRO | Succession | 23/10/2006 | 03/06/2006 |
| NETHERLANDS THE | Signature | 13/12/1957 | |
| PORTUGAL | Signature | 13/12/1957 | |
| PORTUGAL | Ratification | 26/03/1959 | |
| ROMANIA | Accession | 20/12/1963 | |
| ROMANIA | Reservation | 20/12/1963 | |
| SLOVAK REPUBLIC | Succession | 28/05/1993 | 01/01/1993 |
| SPAIN | Accession | 03/01/1961 | |
| SWITZERLAND | Signature | 17/02/1958 | |
| TURKEY | Signature | 28/02/1958 | |
| TURKEY | Ratification | 25/05/1961 | |
| UNITED KINGDOM | Signature | 25/02/1958 | |
| YUGOSLAVIA | Accession | 29/05/1959 | |
| YUGOSLAVIA, FEDERAL REPUBLIC OF | Succession | 12/03/2001 | 27/04/1992 |