| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| BELGIUM | Accession | 28/10/1952 | 01/01/1900 |
| CANADA | Accession | 30/05/1953 | 01/01/1900 |
| DENMARK | Accession | 22/12/1952 | 01/01/1900 |
| DOMINICAN REPUBLIC | Accession | 21/08/1952 | 01/01/1900 |
| FRANCE | Signature | 29/11/1950 | 01/01/1900 |
| INDIA | Accession | 04/03/1953 | 01/01/1900 |
| ITALY | Signature | 29/11/1950 | 01/01/1900 |
| ITALY | Ratification | 30/05/1953 | 01/01/1900 |
| NORWAY | Accession | 02/03/1953 | 01/01/1900 |
| TURKEY | Accession | 10/12/1952 | 01/01/1900 |
| UNITED KINGDOM | Signature | 29/11/1950 | 01/01/1900 |
| UNITED STATES OF AMERICA | Signature | 29/11/1950 | 01/01/1900 |