| Country | Action | Action Date | Effective Date |
|---|
| BELGIUM | Signature | 17/09/1948 | |
| BELGIUM | Ratification | 06/12/1949 | |
| Cyprus | Extension | 15/12/1949 | |
| DENMARK | Signature | 17/09/1948 | |
| DENMARK | Ratification | 20/02/1949 | |
| FRANCE | Signature | 17/09/1948 | |
| FRANCE | Ratification | 19/03/1950 | |
| Gibraltar | Extension | 15/12/1949 | |
| GREECE | Signature | 17/09/1948 | |
| GREECE | Ratification | 28/12/1951 | |
| ICELAND | Signature | 17/09/1948 | |
| ICELAND | Ratification | 04/02/1950 | |
| IRELAND, REPUBLIC OF | Signature | 17/07/1949 | |
| IRELAND, REPUBLIC OF | Ratification | 17/07/1950 | |
| ITALY | Signature | 17/09/1948 | |
| ITALY | Ratification | 04/06/1952 | |
| Malta | Extension | 15/12/1949 | |
| MONACO | Signature | 17/09/1948 | |
| MONACO | Ratification | 29/06/1950 | |
| MOROCCO | Signature | 01/01/1905 | |
| MOROCCO | Ratification | 01/01/1905 | |
| Morocco | Extension | 19/03/1950 | |
| NETHERLANDS THE | Signature | 17/09/1948 | |
| NETHERLANDS THE | Ratification | 06/10/1949 | |
| NORWAY | Signature | 17/09/1948 | |
| NORWAY | Ratification | 14/02/1950 | |
| PORTUGAL | Signature | 17/09/1948 | |
| SOVIET UNION | Statement | 17/09/1948 | |
| SWEDEN | Signature | 17/09/1948 | |
| SWEDEN | Ratification | 02/01/1950 | |
| TUNISIA | Signature | 01/01/1905 | |
| TUNISIA | Ratification | 01/01/1905 | |
| Tunisia | Extension | 19/03/1950 | |
| TURKEY | Signature | 17/09/1948 | |
| UNITED KINGDOM | Statement | 17/09/1948 | |
| UNITED KINGDOM | Signature | 17/09/1948 | |
| UNITED KINGDOM | Ratification | 15/12/1949 | |
| UNITED KINGDOM | Declaration | 15/12/1949 | |