| Country | Action | Action Date | Effective Date |
|---|
| AUSTRIA | Signature | 19/10/1952 | |
| AUSTRIA | Ratification | 21/01/1953 | 21/01/1953 |
| AUSTRIA | Reservation | 21/01/1953 | |
| AUSTRIA | Withdrawal Res. | 05/04/1960 | |
| BELGIUM | Signature | 15/12/1950 | |
| BELGIUM | Ratification | 11/12/1952 | 11/12/1952 |
| DENMARK | Signature | 30/03/1951 | 30/03/1951 |
| FRANCE | Signature | 22/12/1950 | |
| FRANCE | Ratification | 06/10/1952 | 06/10/1952 |
| GERMANY | Signature | 30/03/1951 | 30/03/1951 |
| GREECE | Signature | 09/01/1951 | |
| GREECE | Ratification | 10/12/1951 | 10/12/1951 |
| ICELAND | Signature | 18/07/1952 | 18/07/1952 |
| IRELAND, REPUBLIC OF | Signature | 12/03/1952 | |
| IRELAND, REPUBLIC OF | Ratification | 23/09/1952 | 23/09/1952 |
| ITALY | Signature | 10/01/1951 | 10/01/1951 |
| LUXEMBOURG | Signature | 08/01/1951 | |
| LUXEMBOURG | Ratification | 23/01/1953 | 23/01/1953 |
| NETHERLANDS THE | Signature | 29/12/1950 | |
| NETHERLANDS THE | Ratification | 23/01/1953 | 23/01/1953 |
| NORWAY | Signature | 28/03/1951 | |
| NORWAY | Ratification | 06/08/1951 | 06/08/1951 |
| PORTUGAL | Signature | 29/03/1951 | |
| PORTUGAL | Ratification | 29/05/1953 | 29/05/1953 |
| SWEDEN | Signature | 30/03/1951 | |
| SWEDEN | Ratification | 17/10/1952 | 17/10/1952 |
| SWITZERLAND | Accession | 19/12/1952 | |
| TURKEY | Signature | 22/06/1951 | |
| TURKEY | Ratification | 29/04/1953 | 29/04/1953 |
| UNITED ARAB EMIRATES | Accession | 07/02/1979 | |
| UNITED KINGDOM | Signature | 21/02/1951 | |
| UNITED KINGDOM | Ratification | 12/09/1952 | 12/09/1952 |
| UNITED STATES OF AMERICA | Accession | 05/11/1970 | |