| Contracting Parties/Signatories | Signature | Instrument | In Force | Details |
|---|
| Armenia | | Accession: August 23, 2010 | February 23, 2011 | |
| Australia | | Accession: March 5, 1992 | September 5, 1992 | Details |
| Austria | February 4, 1993 | Ratification: June 28, 1994 | December 28, 1994 | Details |
| Barbados | | Accession: April 10, 1979 | January 2, 1982 | Details |
| Belgium | June 18, 1980 | Ratification: September 25, 1986 | March 25, 1987 | Details |
| Bosnia and Herzegovina | | Declaration / Notification of Succession: September 1, 1993 | March 6, 1992 | Details |
| Bulgaria | | Accession: March 14, 1997 | September 14, 1997 | |
| Burkina Faso | | Accession: December 3, 2009 | June 3, 2010 | |
| Croatia | | Declaration / Notification of Succession: July 26, 1993 | October 8, 1991 | Details |
| Cuba | | Accession: May 15, 1992 | November 15, 1992 | |
| Cyprus | | Accession: August 3, 2004 | February 3, 2005 | Details |
| Czech Republic | | Accession: August 22, 1997 | February 22, 1998 | |
| Denmark | June 18, 1980 | Ratification: February 17, 1983 | August 17, 1983 | Details |
| Egypt | | Accession: September 18, 1981 | January 2, 1981 | |
| Estonia | | Accession: August 1, 2001 | February 1, 2002 | |
| Finland | | Accession: February 17, 1987 | August 17, 1987 | Details |
| France | June 18, 1980 | Ratification: January 3, 1986 | July 3, 1986 | Details |
| Germany | June 18, 1980 | Ratification: August 17, 1989 | February 17, 1990 | Details |
| Greece | | Accession: March 4, 1983 | September 4, 1983 | Details |
| Holy See | | Accession: February 22, 1980 | January 2, 1982 | |
| Iraq | | Accession: April 13, 1978 | January 2, 1982 | Details |
| Ireland | June 18, 1980 | Ratification: June 18, 1980 | January 2, 1982 | Details |
| Italy | June 18, 1980 | Ratification: July 2, 1981 | January 2, 1982 | Details |
| Kazakhstan | | Accession: December 21, 1998 | June 21, 1999 | |
| Latvia | | Accession: November 20, 2001 | May 20, 2002 | |
| Liberia | | Accession: September 16, 2005 | December 16, 2005 | |
| Lithuania | | Accession: August 21, 1998 | February 21, 1999 | Details |
| Luxembourg | June 18, 1980 | Ratification: June 22, 1980 | December 22, 1982 | Details |
| Montenegro | | Declaration / Notification of Succession: October 23, 2006 | June 3, 2006 | Details |
| Netherlands | June 18, 1980 | Ratification: July 15, 1981 | January 15, 1982 | Details |
| New Zealand | October 9, 1981 | | | Details |
| Niger | | Accession: December 29, 2008 | June 29, 2009 | |
| Oman | December 19, 1977 | | | |
| Portugal | | Accession: June 11, 1984 | December 11, 1984 | Details |
| Republic of Moldova | | Accession: September 3, 1998 | March 3, 1999 | |
| Russian Federation | | Accession: October 7, 1994 | April 7, 1995 | |
| San Marino | | Accession: July 30, 1985 | January 30, 1986 | |
| Serbia | | Declaration / Notification of Succession: March 12, 2001 | April 27, 1992 | Details |
| Slovakia | | Accession: June 9, 1997 | December 9, 1997 | |
| Slovenia | | Declaration / Notification of Succession: July 6, 1992 | June 25, 1991 | Details |
| Spain | | Accession: October 2, 1992 | April 2, 1993 | Details |
| Sweden | | Accession: July 30, 1997 | January 30, 1998 | Details |
| the former Yugoslav Republic of Macedonia | | Declaration / Notification of Succession: September 2, 1997 | November 17, 1991 | Details |
| Togo | | Accession: November 16, 2009 | May 16, 2010 | |
| United Kingdom | June 18, 1980 | Ratification: June 9, 1982 | December 9, 1982 | Details |
| United States of America | September 1, 1981 | Ratification: May 15, 1989 | November 15, 1989 | Details |
| Uruguay | | Accession: April 20, 1999 | October 20, 1999 | |
| Venezuela (Bolivarian Republic of) | | Accession: May 1, 1992 | November 1, 1992 | |
