| Country | Action | Action Date | Effective Date |
|---|
| BELGIUM | Acceptance | 01/01/1905 | |
| BELGIUM | Signature | 25/09/1946 | |
| CANADA | Signature | 25/09/1946 | |
| CANADA | Acceptance | 13/11/1947 | |
| FRANCE | Signature | 25/09/1946 | |
| IRELAND, REPUBLIC OF | Signature | 25/09/1946 | |
| IRELAND, REPUBLIC OF | Acceptance | 13/11/1947 | |
| NETHERLANDS THE | Signature | 25/09/1946 | |
| NORWAY | Signature | 25/09/1946 | |
| NORWAY | Acceptance | 13/11/1947 | |
| PORTUGAL | Accession | 24/01/1947 | |
| SWEDEN | Signature | 25/09/1946 | |
| SWEDEN | Acceptance | 13/11/1947 | |
| UNITED KINGDOM | Signature | 25/09/1946 | |
| UNITED KINGDOM | Acceptance | 30/06/1947 | |
| UNITED STATES OF AMERICA | Acceptance | 01/01/1905 | |
| UNITED STATES OF AMERICA | Signature | 25/09/1946 | |