| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| ALGERIA | Accession | 26/06/1979 | |
| AUSTRALIA | Accession | 18/08/1959 | |
| AUSTRIA | Signature | 12/10/1955 | |
| AUSTRIA | Ratification | 27/06/1956 | |
| Bahamas | Extension | 11/03/1970 | |
| BELARUS | Accession | 30/12/1993 | 29/01/1994 |
| Belgian Congo | Extension | 10/11/1959 | |
| BELGIUM | Signature | 12/10/1955 | |
| BELGIUM | Ratification | 10/11/1959 | |
| BELGIUM | Declaration | 10/11/1959 | |
| BRAZIL | Accession | 17/01/1984 | 16/02/1984 |
| British Virgin Islands | Extension | 11/03/1970 | |
| BULGARIA | Accession | 04/06/1956 | |
| CAMEROON | Accession | 21/09/1970 | |
| CHINA | Accession | 26/03/1985 | 26/04/1985 |
| CUBA | Signature | 12/10/1955 | |
| CUBA | Ratification | 30/10/1962 | |
| CYPRUS | Accession | 19/06/1974 | |
| CZECH REPUBLIC | Accession | 13/01/1993 | 12/02/1993 |
| CZECHOSLOVAKIA | Signature | 12/10/1955 | |
| CZECHOSLOVAKIA | Ratification | 12/10/1956 | |
| DENMARK | Signature | 12/10/1955 | |
| DENMARK | Ratification | 11/02/1957 | |
| DOMINICAN REPUBLIC | Signature | 12/10/1955 | |
| ETHIOPIA | Accession | 08/01/1974 | |
| Fiji | Extension | 11/03/1970 | |
| FINLAND | Signature | 12/10/1955 | |
| FINLAND | Ratification | 28/04/1958 | |
| FRANCE | Signature | 12/10/1955 | |
| FRANCE | Ratification | 23/04/1958 | |
| GERMAN DEMOCRATIC REPUBLIC | Accession | 28/05/1958 | |
| GERMANY FEDERAL REPUBLIC | Signature | 12/10/1955 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 08/12/1959 | |
| Gibraltar | Extension | 11/03/1970 | |
| GREECE | Accession | 26/06/1979 | |
| GUINEA | Accession | 05/03/1960 | |
| HUNGARY | Signature | 12/10/1955 | |
| HUNGARY | Ratification | 19/09/1956 | |
| INDIA | Signature | 12/10/1955 | |
| INDIA | Ratification | 27/10/1956 | |
| INDONESIA | Accession | 30/09/1960 | |
| IRAN | Signature | 12/10/1955 | |
| IRAN | Ratification | 30/09/1959 | |
| IRELAND, REPUBLIC OF | Accession | 05/03/1979 | 04/04/1979 |
| ISRAEL | Accession | 07/07/1966 | |
| ITALY | Accession | 28/10/1958 | |
| JAPAN | Accession | 16/05/1961 | |
| KAZAKHSTAN | Accession | 14/12/1994 | 13/01/1995 |
| KOREA DEMOCRATIC PEOPLE'S REPUBLIC OF | Accession | 09/05/1974 | |
| KOREA REPUBLIC OF | Accession | 02/05/1978 | |
| LEBANON | Accession | 06/11/1962 | |
| MACEDONIA THE FYR OF | Succession | 11/08/1994 | |
| MONACO | Signature | 12/10/1955 | |
| MONACO | Ratification | 09/08/1958 | |
| Montserrat | Extension | 11/03/1970 | |
| MOROCCO | Ratification | 10/09/1958 | 10/10/1958 |
| NETHERLANDS THE | Signature | 12/10/1955 | |
| NETHERLANDS THE | Ratification | 12/06/1958 | |
| NEW ZEALAND | Accession | 21/01/1959 | |
| NORWAY | Signature | 12/10/1955 | |
| NORWAY | Ratification | 28/04/1958 | |
| PAKISTAN | Accession | 02/03/1962 | |
| POLAND | Signature | 12/10/1955 | |
| POLAND | Ratification | 16/07/1957 | |
| PORTUGAL | Accession | 26/11/1986 | |
| ROMANIA | Signature | 12/10/1955 | |
| ROMANIA | Ratification | 17/10/1956 | |
| Ruanda Urundi | Extension | 10/11/1959 | |
| SAUDI ARABIA | Accession | 19/10/1989 | 19/11/1989 |
| Seychelles | Extension | 11/03/1970 | |
| SLOVAK REPUBLIC | Accession | 13/01/1993 | 12/02/1993 |
| SLOVENIA | Accession | 22/01/1993 | 21/02/1993 |
| SOVIET UNION | Signature | 12/10/1955 | |
| SOVIET UNION | Ratification | 18/12/1956 | |
| SPAIN | Signature | 12/10/1955 | |
| SPAIN | Ratification | 14/05/1957 | |
| SWEDEN | Signature | 12/10/1955 | |
| SWEDEN | Ratification | 11/07/1958 | |
| SWITZERLAND | Signature | 12/10/1955 | |
| SWITZERLAND | Ratification | 09/10/1956 | |
| TANZANIA | Accession | 29/08/1979 | |
| TURKEY | Accession | 22/03/1962 | |
| Turks And Caicos Islands | Extension | 11/03/1970 | |
| UNITED KINGDOM | Accession | 11/05/1962 | |
| UNITED KINGDOM | Declaration | 11/05/1962 | |
| UNITED KINGDOM | Declaration | 11/03/1970 | |
| UNITED STATES OF AMERICA | Accession | 22/09/1972 | |
| VENEZUELA | Accession | 25/07/1960 | |
| YUGOSLAVIA | Signature | 12/10/1955 | |
| YUGOSLAVIA | Ratification | 07/05/1957 | |
| ZAMBIA | Accession | 10/12/1990 | 09/01/1991 |