| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| AUSTRALIA | Accession | 07/01/1961 | |
| AUSTRIA | Accession | 24/08/1969 | 30/11/1969 |
| BELGIUM | Accession | 06/05/1962 | |
| BELGIUM | Declaration | 06/05/1962 | |
| CZECHOSLOVAKIA | Signature | 15/06/1957 | |
| CZECHOSLOVAKIA | Ratification | 21/10/1960 | |
| DENMARK | Signature | 15/06/1957 | |
| DENMARK | Ratification | 30/10/1961 | 30/11/1961 |
| FRANCE | Signature | 15/06/1957 | |
| FRANCE | Ratification | 09/11/1959 | |
| French Overseas Territories | Extension | 29/03/1962 | |
| GERMAN DEMOCRATIC REPUBLIC | Accession | 23/09/1964 | 15/01/1965 |
| GERMANY FEDERAL REPUBLIC | Signature | 15/06/1957 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 29/12/1961 | 29/01/1962 |
| GERMANY FEDERAL REPUBLIC | Declaration | 29/12/1961 | |
| HUNGARY | Accession | 29/12/1966 | 23/03/1967 |
| HUNGARY | Declaration | 29/12/1966 | |
| IRELAND, REPUBLIC OF | Accession | 12/12/1966 | |
| ISRAEL | Accession | 20/09/1960 | 07/10/1960 |
| ITALY | Signature | 15/06/1957 | |
| ITALY | Ratification | 25/07/1960 | |
| KAZAKHSTAN | Accession | 24/01/2002 | |
| Land Berlin | Extension | 29/12/1961 | |
| LEBANON | Signature | 15/06/1957 | |
| LEBANON | Ratification | 30/05/1960 | |
| LIECHTENSTEIN | Accession | 29/05/1967 | |
| LUXEMBOURG | Signature | 15/06/1957 | |
| MALAYSIA | |||
| MONACO | Signature | 15/06/1957 | |
| MONACO | Ratification | 08/03/1961 | |
| MOROCCO | Accession | 01/10/1966 | |
| MOZAMBIQUE | Accession | 18/10/2001 | 18/01/2002 |
| NETHERLANDS THE | Accession | 11/05/1962 | 20/08/1962 |
| NETHERLANDS THE | Declaration | 20/02/1989 | |
| NORWAY | Signature | 15/06/1957 | |
| NORWAY | Ratification | 28/06/1961 | 28/07/1961 |
| POLAND | Signature | 15/06/1957 | |
| POLAND | Ratification | 25/03/1958 | |
| POLAND | Withdrawal | 17/12/1981 | 20/07/1982 |
| PORTUGAL | Signature | 15/06/1957 | |
| PORTUGAL | Ratification | 02/04/1959 | |
| ROMANIA | Signature | 31/12/1958 | |
| SPAIN | Signature | 15/06/1957 | |
| SPAIN | Ratification | 13/11/1958 | |
| SWEDEN | Signature | 15/06/1957 | |
| SWEDEN | Ratification | 28/06/1961 | 28/07/1961 |
| SWITZERLAND | Accession | 20/07/1962 | 20/08/1962 |
| TUNISIA | Accession | 29/05/1967 | |
| TURKEY | Signature | 31/12/1958 | |
| UNITED KINGDOM | Signature | 15/06/1957 | |
| UNITED KINGDOM | Accession | 29/10/1962 | 15/04/1963 |
| UNITED STATES OF AMERICA | Accession | 25/05/1972 | |
| UZBEKISTAN | Accession | 12/10/2001 | 02/01/2002 |
| YUGOSLAVIA | Signature | 15/06/1957 | |
| YUGOSLAVIA | Ratification | 23/09/1966 |