| Country | Action | Action Date | Effective Date |
|---|
| AUSTRALIA | Signature | 18/10/1956 | |
| AUSTRALIA | Ratification | 21/10/1957 | |
| AUSTRIA | Signature | 18/10/1956 | |
| AUSTRIA | Ratification | 13/12/1957 | |
| Belgian Congo | Extension | 06/06/1957 | |
| BELGIUM | Signature | 18/10/1956 | |
| BELGIUM | Ratification | 06/06/1957 | |
| BOLIVIA | Signature | 18/10/1956 | |
| BOLIVIA | Ratification | 17/01/1958 | |
| CANADA | Signature | 18/10/1956 | |
| CANADA | Acceptance | 09/07/1958 | |
| DENMARK | Signature | 18/10/1956 | |
| DENMARK | Acceptance | 06/03/1958 | |
| ECUADOR | Signature | 18/10/1956 | |
| FRANCE | Signature | 18/10/1956 | |
| FRANCE | Ratification | 16/05/1958 | |
| INDIA | Signature | 18/10/1956 | |
| INDIA | Ratification | 14/02/1958 | |
| INDONESIA | Signature | 18/10/1956 | |
| INDONESIA | Acceptance | 19/04/1958 | |
| ISRAEL | Signature | 18/10/1956 | |
| ISRAEL | Acceptance | 16/12/1957 | |
| ITALY | Signature | 18/10/1956 | |
| ITALY | Ratification | 23/05/1957 | |
| JAPAN | Signature | 18/10/1956 | |
| LEBANON | Signature | 18/10/1956 | |
| Malay States, Federated | Extension | 22/07/1957 | |
| NETHERLANDS THE | Signature | 18/10/1956 | |
| NETHERLANDS THE | Acceptance | 29/04/1958 | |
| NETHERLANDS THE | Statement | 29/04/1958 | |
| Nigeria | Extension | 22/07/1957 | |
| Ruanda Urundi | Extension | 06/06/1957 | |
| SPAIN | Signature | 18/10/1956 | |
| SPAIN | Acceptance | 27/02/1957 | |
| THAILAND | Signature | 18/10/1956 | |
| THAILAND | Acceptance | 01/01/1958 | |
| TURKEY | Signature | 18/10/1956 | |
| TURKEY | Ratification | 22/10/1958 | |
| UNITED KINGDOM | Signature | 18/10/1956 | |
| UNITED KINGDOM | Ratification | 22/07/1957 | |
| UNITED KINGDOM | Acceptance | 22/07/1957 | |