| Country | Action | Action Date | Effective Date |
|---|
| BELGIUM | Signature | 19/06/1951 | |
| BELGIUM | Ratification | 27/02/1953 | |
| Bermuda | Extension | 11/12/2001 | |
| CANADA | Signature | 19/06/1951 | |
| CANADA | Ratification | 28/08/1953 | |
| DENMARK | Signature | 19/06/1951 | |
| DENMARK | Ratification | 28/05/1955 | |
| FRANCE | Signature | 19/06/1951 | |
| FRANCE | Ratification | 29/09/1952 | |
| GERMANY | Accession | 01/06/1963 | |
| GREECE | Accession | 26/07/1954 | |
| HUNGARY | Accession | 21/01/2000 | 20/02/2000 |
| ICELAND | Signature | 19/06/1951 | |
| Isle of Man | Extension | 01/03/1962 | |
| ITALY | Signature | 19/06/1951 | |
| ITALY | Ratification | 22/12/1955 | |
| LATVIA | Accession | 02/08/2004 | 01/09/2004 |
| LITHUANIA | Accession | 21/07/2004 | 20/08/2004 |
| LUXEMBOURG | Signature | 19/06/1951 | |
| LUXEMBOURG | Ratification | 19/03/1954 | |
| NETHERLANDS THE | Signature | 19/06/1951 | |
| NETHERLANDS THE | Ratification | 18/11/1953 | |
| NORWAY | Signature | 19/06/1951 | |
| NORWAY | Ratification | 24/02/1953 | |
| POLAND | Accession | 21/09/1999 | 21/10/1999 |
| PORTUGAL | Signature | 19/06/1951 | |
| PORTUGAL | Ratification | 22/11/1955 | |
| SLOVAK REPUBLIC | Accession | 13/09/2004 | 13/10/2004 |
| SLOVENIA | Accession | 28/09/2004 | 28/10/2004 |
| TURKEY | Accession | 18/05/1954 | |
| UNITED KINGDOM | Signature | 19/06/1951 | |
| UNITED KINGDOM | Ratification | 13/05/1954 | |
| UNITED KINGDOM | Declaration | 01/03/1962 | |
| UNITED STATES OF AMERICA | Signature | 19/06/1951 | |
| UNITED STATES OF AMERICA | Ratification | 24/07/1953 | |