| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| Antilles | Extension | 01/01/1986 | |
| ARGENTINA | Signature | 01/12/1959 | |
| ARGENTINA | Ratification | 23/06/1961 | |
| Aruba | Extension | 01/01/1986 | |
| AUSTRALIA | Signature | 01/12/1959 | |
| AUSTRALIA | Ratification | 23/06/1961 | |
| AUSTRALIA | Communication | 22/12/2004 | 01/01/1900 |
| AUSTRIA | Accession | 25/08/1987 | |
| BELGIUM | Signature | 01/12/1959 | |
| BELGIUM | Ratification | 26/07/1960 | |
| Berlin West | Extension | 05/02/1979 | |
| BRAZIL | Accession | 16/05/1975 | |
| BULGARIA | Accession | 11/09/1978 | |
| CANADA | Accession | 04/05/1988 | |
| CHILE | Signature | 01/12/1959 | |
| CHILE | Ratification | 23/06/1961 | |
| CHINA | Accession | 08/06/1983 | |
| COLOMBIA | Accession | 31/01/1989 | |
| CUBA | Accession | 16/08/1984 | |
| CZECH REPUBLIC | Succession | 01/01/1993 | |
| CZECHOSLOVAKIA | Accession | 14/06/1962 | |
| CZECHOSLOVAKIA | Objection | 11/06/1979 | |
| DENMARK | Accession | 20/05/1965 | |
| ECUADOR | Accession | 15/09/1987 | |
| ESTONIA | Accession | 17/05/2001 | 17/05/2001 |
| FINLAND | Accession | 15/05/1984 | |
| FRANCE | Signature | 01/12/1959 | |
| FRANCE | Ratification | 16/09/1960 | |
| GERMAN DEMOCRATIC REPUBLIC | Accession | 19/11/1974 | |
| GERMANY FEDERAL REPUBLIC | Accession | 05/02/1979 | |
| GERMANY FEDERAL REPUBLIC | Statement | 05/02/1979 | |
| GERMANY FEDERAL REPUBLIC | Declaration | 19/01/1981 | |
| GREECE | Accession | 08/01/1987 | |
| GUATEMALA | Accession | 31/07/1991 | 31/07/1991 |
| HUNGARY | Accession | 27/01/1984 | |
| INDIA | Accession | 19/08/1983 | |
| INDIA | Declaration | 19/08/1983 | |
| ITALY | Accession | 18/03/1981 | |
| JAPAN | Signature | 01/12/1959 | |
| JAPAN | Ratification | 04/08/1960 | |
| KOREA DEMOCRATIC PEOPLE'S REPUBLIC OF | Accession | 21/01/1987 | |
| KOREA REPUBLIC OF | Accession | 28/11/1986 | |
| MONACO | Accession | 31/05/2008 | |
| NETHERLANDS THE | Accession | 30/03/1967 | |
| NEW ZEALAND | Signature | 01/12/1959 | |
| NEW ZEALAND | Ratification | 01/11/1960 | |
| NORWAY | Signature | 01/12/1959 | |
| NORWAY | Ratification | 24/08/1960 | |
| PAPUA NEW GUINEA | Succession | 16/03/1981 | |
| PERU | Accession | 10/04/1981 | |
| POLAND | Accession | 08/06/1961 | |
| PORTUGAL | Approval | 29/01/2010 | 29/10/2010 |
| ROMANIA | Accession | 15/09/1971 | |
| ROMANIA | Statement | 15/09/1971 | |
| SLOVAK REPUBLIC | Succession | 01/01/1993 | |
| SOUTH AFRICA | Signature | 01/12/1959 | |
| SOUTH AFRICA | Ratification | 21/06/1960 | |
| SOVIET UNION | Signature | 01/12/1959 | |
| SOVIET UNION | Ratification | 02/11/1960 | |
| SOVIET UNION | Objection | 04/05/1979 | |
| SPAIN | Accession | 31/03/1982 | |
| SWEDEN | Accession | 24/04/1984 | |
| SWEDEN | Communication | 22/12/2004 | 01/01/1900 |
| SWITZERLAND | Accession | 15/11/1990 | 15/11/1990 |
| TURKEY | Accession | 25/01/1996 | |
| UKRAINE | Accession | 28/10/1992 | |
| UNITED KINGDOM | Signature | 01/12/1959 | |
| UNITED KINGDOM | Ratification | 31/05/1960 | |
| UNITED STATES OF AMERICA | Signature | 01/12/1959 | |
| UNITED STATES OF AMERICA | Ratification | 18/08/1960 | |
| URUGUAY | Accession | 11/01/1980 | |
| URUGUAY | Declaration | 11/01/1980 |