| Country | Action | Action Date | Effective Date |
|---|
| AUSTRALIA | Accession | 05/03/1959 | 05/03/1959 |
| AUSTRALIA | Withdrawal | 20/12/1975 | 31/12/1976 |
| BELGIUM | Signature | 28/11/1956 | |
| BELGIUM | Acceptance | 15/04/1970 | |
| CANADA | Signature | 28/11/1956 | |
| CANADA | Acceptance | 18/01/1957 | |
| CUBA | Accession | 01/10/1970 | 01/10/1970 |
| CZECHOSLOVAKIA | Accession | 03/06/1965 | |
| CZECHOSLOVAKIA | Reservation | 03/06/1965 | |
| DENMARK | Signature | 25/09/1956 | |
| DENMARK | Acceptance | 18/12/1957 | |
| FINLAND | Accession | 28/12/1972 | 28/12/1972 |
| FRANCE | Signature | 25/09/1956 | |
| FRANCE | Acceptance | 20/11/1962 | |
| GERMANY FEDERAL REPUBLIC | Signature | 28/11/1956 | |
| GERMANY FEDERAL REPUBLIC | Acceptance | 15/10/1957 | |
| GREECE | Accession | 26/05/1972 | |
| ICELAND | Signature | 25/09/1956 | |
| ICELAND | Acceptance | 18/02/1957 | |
| INDIA | Accession | 28/08/1967 | |
| INDIA | Withdrawal | 30/06/1969 | 31/12/1970 |
| IRELAND, REPUBLIC OF | Accession | 03/06/1960 | |
| ISRAEL | Signature | 28/11/1956 | |
| ISRAEL | Acceptance | 13/05/1957 | |
| ISRAEL | Withdrawal | 18/12/1970 | 31/12/1971 |
| ITALY | Signature | 28/11/1956 | |
| ITALY | Acceptance | 07/02/1958 | |
| JAPAN | Accession | 28/03/1963 | |
| JAPAN | Reservation | 28/03/1963 | |
| LEBANON | Accession | 01/09/1983 | 01/09/1983 |
| NETHERLANDS THE | Signature | 25/09/1956 | |
| NETHERLANDS THE | Acceptance | 06/06/1958 | |
| NORWAY | Signature | 25/09/1956 | |
| NORWAY | Acceptance | 10/05/1957 | |
| PAKISTAN | Accession | 27/11/1963 | |
| PAKISTAN | Withdrawal | 23/12/1974 | 31/12/1975 |
| SWEDEN | Signature | 15/11/1956 | |
| SWEDEN | Acceptance | 10/05/1957 | |
| SWITZERLAND | Signature | 25/09/1956 | |
| SWITZERLAND | Acceptance | 16/05/1958 | |
| UNITED KINGDOM | Signature | 25/09/1956 | |
| UNITED KINGDOM | Ratification | 18/10/1957 | |
| UNITED KINGDOM | Acceptance | 18/10/1957 | |
| UNITED STATES OF AMERICA | Signature | 31/10/1956 | |
| UNITED STATES OF AMERICA | Reservation | 31/10/1956 | |
| UNITED STATES OF AMERICA | Acceptance | 08/02/1957 | |