| Country | Action | Action Date | Effective Date |
|---|
| BELGIUM | Signature | 17/03/1948 | |
| BELGIUM | Ratification | 30/04/1948 | |
| FRANCE | Signature | 17/03/1948 | |
| FRANCE | Ratification | 25/08/1948 | |
| FRANCE | Denunciation | 30/06/2010 | 30/06/2011 |
| GREECE | Signature | 06/03/1995 | |
| GREECE | Denunciation | 30/06/2010 | 30/11/2011 |
| IRELAND | Ratification | 02/06/1948 | |
| IRELAND | Denunciation | 30/06/2010 | 30/06/2011 |
| ITALY | Signature | 06/05/1955 | |
| ITALY | Denunciation | 30/06/2010 | 30/06/2011 |
| LUXEMBOURG | Signature | 17/03/1948 | |
| LUXEMBOURG | Ratification | 10/06/1948 | |
| LUXEMBOURG | Denunciation | 30/06/2010 | 30/06/2011 |
| NETHERLANDS THE | Signature | 17/03/1948 | |
| NETHERLANDS THE | Ratification | 20/06/1948 | |
| PORTUGAL | Accession | 14/11/1988 | |
| PORTUGAL | Denunciation | 22/07/2010 | 22/07/2011 |
| UNITED KINGDOM | Signature | 17/03/1948 | |
| UNITED KINGDOM | Ratification | 02/06/1948 | |
| UNITED KINGDOM | Withdrawal | 01/06/2010 | 01/06/2011 |