| Country | Action | Action Date | Effective Date |
|---|
| Antigua | Extension | 09/05/1972 | |
| Antilles | Extension | 16/01/1986 | |
| ARGENTINA | Signature | 24/04/1963 | |
| Aruba | Extension | 16/01/1986 | |
| AUSTRALIA | Accession | 12/02/1973 | 14/03/1973 |
| AUSTRIA | Signature | 24/04/1963 | |
| AUSTRIA | Ratification | 12/06/1969 | |
| BELGIUM | Signature | 31/03/1964 | |
| BELGIUM | Ratification | 09/09/1970 | |
| BENIN | Signature | 24/04/1963 | |
| BOSNIA AND HERZEGOVINA | Succession to Signature | 12/01/1994 | |
| BOTSWANA | Accession | 12/05/2008 | 11/06/2008 |
| British Solomon Islands | Extension | 09/05/1972 | |
| BULGARIA | Accession | 11/07/1989 | 10/08/1989 |
| CAMEROON | Signature | 21/08/1963 | |
| CENTRAL AFRICAN REPUBLIC | Signature | 24/04/1963 | |
| CHILE | Signature | 24/04/1963 | |
| COLOMBIA | Signature | 24/04/1963 | |
| CONGO, DEMOCRATIC REPUBLIC OF | Signature | 24/04/1963 | |
| DENMARK | Signature | 24/04/1963 | |
| DENMARK | Ratification | 15/11/1972 | |
| Dominica | Extension | 09/05/1972 | |
| DOMINICAN REPUBLIC | Signature | 24/04/1963 | |
| DOMINICAN REPUBLIC | Ratification | 04/03/1964 | |
| ESTONIA | Accession | 21/10/1991 | 20/11/1991 |
| FINLAND | Signature | 28/10/1963 | |
| FINLAND | Ratification | 02/07/1980 | 01/08/1980 |
| FRANCE | Signature | 24/04/1963 | |
| FRANCE | Ratification | 31/12/1970 | |
| GABON | Signature | 24/04/1963 | |
| GABON | Ratification | 23/02/1965 | |
| GERMANY FEDERAL REPUBLIC | Signature | 31/10/1963 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 07/09/1971 | |
| GERMANY FEDERAL REPUBLIC | Declaration | 07/09/1971 | |
| GERMANY FEDERAL REPUBLIC | Objection | 07/09/1971 | |
| GERMANY FEDERAL REPUBLIC | Declaration | 24/01/1972 | |
| GHANA | Signature | 24/04/1963 | |
| Grenada | Extension | 09/05/1972 | |
| HUNGARY | Accession | 08/12/1989 | 07/01/1990 |
| ICELAND | Accession | 01/06/1978 | 01/07/1978 |
| INDIA | Accession | 28/11/1977 | 28/12/1977 |
| IRAN | Accession | 05/06/1975 | 05/07/1975 |
| IRELAND, REPUBLIC OF | Signature | 24/04/1963 | |
| ITALY | Signature | 22/11/1963 | |
| ITALY | Ratification | 25/06/1969 | |
| IVORY COAST | Signature | 24/04/1963 | |
| JAPAN | Accession | 03/10/1983 | 02/11/1983 |
| KENYA | Accession | 01/07/1965 | |
| KOREA REPUBLIC OF | Accession | 07/03/1977 | 06/04/1977 |
| KUWAIT | Signature | 10/01/1964 | |
| LAOS | Accession | 09/08/1973 | |
| LEBANON | Signature | 24/04/1963 | |
| LIBERIA | Signature | 24/04/1963 | |
| LIECHTENSTEIN | Signature | 24/04/1963 | |
| LIECHTENSTEIN | Ratification | 18/05/1966 | |
| LITHUANIA | Accession | 26/09/2010 | 26/10/2012 |
| LUXEMBOURG | Signature | 24/03/1964 | |
| LUXEMBOURG | Ratification | 08/03/1972 | 07/04/1972 |
| MADAGASCAR | Accession | 17/02/1967 | |
| MALAWI | Accession | 23/02/1981 | 25/03/1981 |
| MAURITIUS | Accession | 13/05/1970 | |
| MEXICO | Accession | 15/03/2002 | 14/04/2002 |
| MONTENEGRO | Succession to Signature | 23/10/2006 | 03/06/2006 |
| NAURU | Accession | 14/12/2012 | 13/01/2013 |
| NEPAL | Accession | 28/09/1965 | |
| NETHERLANDS THE | Accession | 17/12/1985 | 16/01/1986 |
| NEW ZEALAND | Accession | 10/09/1974 | 10/10/1974 |
| NICARAGUA | Accession | 09/01/1990 | 08/02/1990 |
| NIGER | Signature | 24/04/1963 | |
| NIGER | Ratification | 21/06/1978 | 21/07/1978 |
| NORWAY | Signature | 24/04/1963 | |
| NORWAY | Ratification | 13/02/1980 | 14/03/1980 |
| OMAN | Accession | 31/05/1974 | 30/06/1974 |
| OMAN | Declaration | 31/05/1974 | |
| PAKISTAN | Accession | 29/03/1976 | 28/04/1976 |
| PANAMA | Signature | 04/12/1963 | |
| PANAMA | Ratification | 28/08/1967 | |
| PARAGUAY | Accession | 23/12/1969 | |
| PERU | Signature | 24/04/1963 | |
| PERU | Ratification | 23/03/2007 | 22/04/2007 |
| PHILIPPINES | Signature | 24/04/1963 | |
| PHILIPPINES | Ratification | 15/11/1965 | |
| ROMANIA | Accession | 19/09/2007 | 19/10/2007 |
| SENEGAL | Accession | 29/04/1966 | |
| SEYCHELLES | Accession | 29/05/1979 | 28/06/1979 |
| SPAIN | Acceptance | 21/09/2011 | 21/10/2011 |
| St Christopher, Nevis and Anguilla | Extension | 09/05/1972 | |
| St Lucia | Extension | 09/05/1972 | |
| St Vincent | Extension | 09/05/1972 | |
| SURINAME | Accession | 11/09/1980 | 11/10/1980 |
| SWEDEN | Signature | 08/10/1963 | |
| SWEDEN | Ratification | 19/03/1974 | |
| SWITZERLAND | Signature | 23/10/1963 | |
| SWITZERLAND | Ratification | 03/05/1965 | |
| TAIWAN | Signature | 24/04/1963 | |
| UNITED KINGDOM | Signature | 27/03/1964 | |
| UNITED KINGDOM | Ratification | 09/05/1972 | |
| UNITED KINGDOM | Notification | 10/06/1997 | 01/07/1997 |
| UNITED STATES OF AMERICA | Signature | 24/04/1963 | |
| UNITED STATES OF AMERICA | Ratification | 24/11/1969 | |
| UNITED STATES OF AMERICA | Withdrawal | 07/03/2005 | 01/01/1900 |
| UPPER VOLTA | Signature | 24/04/1963 | |
| UPPER VOLTA | Ratification | 11/08/1964 | |
| URUGUAY | Signature | 24/04/1963 | |
| VIETNAM, REPUBLIC OF | Accession | 10/05/1973 | 09/06/1973 |
| YUGOSLAVIA | Signature | 24/04/1963 | |
| YUGOSLAVIA, FEDERAL REPUBLIC OF | Succession to Signature | 12/03/2001 | 27/04/1992 |
| ZAIRE | Signature | 24/04/1963 | |