| Country | Action | Action Date | Effective Date |
|---|
| AUSTRIA | Approval | 25/08/1953 | |
| BELGIUM | Approval | 15/07/1958 | |
| BRAZIL | Approval | 20/09/1955 | |
| CHILE | Approval | 03/05/1957 | |
| DENMARK | Approval | 03/03/1955 | |
| EGYPT | Approval | 11/02/1955 | |
| FINLAND | Approval | 21/11/1953 | |
| FRANCE | Approval | 22/07/1953 | |
| GERMANY FEDERAL REPUBLIC | Approval | 17/11/1953 | |
| GREECE | Approval | 10/10/1953 | |
| HOLY SEE | Approval | 03/06/1955 | |
| INDIA | Approval | 28/12/1954 | |
| IRAN | Approval | 12/07/1957 | |
| IRELAND | Approval | 01/11/1953 | |
| ISRAEL | Approval | 05/04/1954 | |
| ITALY | Approval | 15/06/1957 | |
| JAPAN | Approval | 21/03/1955 | |
| LUXEMBOURG | Approval | 13/06/1955 | |
| NETHERLANDS THE | Approval | 22/03/1955 | |
| NORWAY | Approval | 16/07/1953 | |
| SAN MARINO | Approval | 13/10/1955 | |
| SWEDEN | Approval | 09/01/1954 | |
| SWITZERLAND | Approval | 17/02/1955 | |
| TURKEY | Approval | 04/08/1953 | |
| UNITED KINGDOM | | | |
| YUGOSLAVIA | Approval | 17/09/1957 | |