| Country | Action | Action Date | Effective Date |
|---|
| BELGIUM | Signature | 14/12/1957 | |
| BELGIUM | Acceptance | 18/04/1958 | |
| BELGIUM | Denunciation | 30/06/2010 | 30/06/2011 |
| FRANCE | Signature | 14/12/1957 | |
| FRANCE | Acceptance | 20/05/1959 | |
| GERMANY FEDERAL REPUBLIC | Signature | 14/12/1957 | |
| GERMANY FEDERAL REPUBLIC | Acceptance | 13/11/1961 | |
| GREECE | Ratification | 06/03/1995 | |
| GREECE | Denunciation | 30/06/2010 | 30/06/2011 |
| ITALY | Signature | 14/12/1957 | |
| ITALY | Acceptance | 24/03/1958 | |
| ITALY | Denunciation | 30/06/2010 | 30/06/2011 |
| LUXEMBOURG | Signature | 14/12/1957 | |
| LUXEMBOURG | Acceptance | 08/08/1961 | |
| NETHERLANDS THE | Signature | 14/12/1957 | |
| NETHERLANDS THE | Acceptance | 05/09/1958 | |
| PORTUGAL | Denunciation | | |
| PORTUGAL | Accession | 14/11/1988 | |
| UNITED KINGDOM | Signature | 14/12/1957 | |
| UNITED KINGDOM | Ratification | 20/06/1958 | |
| UNITED KINGDOM | Acceptance | 20/06/1958 | |
| UNITED KINGDOM | Denunciation | 30/06/2010 | 30/06/2011 |