| Contracting Parties/Signatories | Signature | Instrument | In Force | Details |
| Algeria | October 8, 1968 | | | |
| Argentina | | Accession: February 9, 2009 | May 9, 2009 | |
| Armenia | | Accession: April 13, 2007 | July 13, 2007 | |
| Austria | October 8, 1968 | Ratification: June 22, 1990 | September 26, 1990 | |
| Azerbaijan | | Accession: July 14, 2003 | October 14, 2003 | |
| Belarus | | Accession: April 24, 1998 | July 24, 1998 | |
| Belgium | October 8, 1968 | Ratification: March 23, 2004 | June 23, 2004 | |
| Bosnia and Herzegovina | | Declaration of Continued Application: June 2, 1993 | March 1, 1992 | Details |
| Bulgaria | | Accession: November 27, 2000 | February 27, 2001 | |
| China | | Accession: June 17, 1996 | September 19, 1996 | |
| Croatia | | Declaration / Notification of Succession: July 28, 1992 | October 8, 1991 | Details |
| Cuba | | Accession: July 9, 1998 | October 9, 1998 | |
| Czech Republic | | Declaration of Continued Application: December 18, 1992 | January 1, 1993 | Details |
| Democratic People's Republic of Korea | | Accession: March 6, 1997 | June 6, 1997 | |
| Denmark | October 8, 1968 | Ratification: January 27, 1971 | April 27, 1971 | |
| Estonia | | Accession: July 31, 1996 | October 31, 1996 | |
| Finland | October 8, 1968 | Ratification: February 15, 1972 | May 16, 1972 | |
| France | March 12, 1969 | Ratification: June 11, 1975 | September 13, 1975 | Details |
| Germany | October 8, 1968 | Ratification: July 25, 1990 | October 25, 1990 | Details |
| Greece | | Accession: June 4, 1999 | September 4, 1999 | |
| Guinea | | Accession: August 5, 1996 | November 5, 1996 | |
| Holy See | October 8, 1968 | | | |
| Hungary | October 8, 1968 | Ratification: September 28, 1973 | January 1, 1974 | |
| Iceland | | Accession: December 23, 1994 | April 9, 1995 | |
| Iran (Islamic Republic of) | October 8, 1968 | | | |
| Ireland | | Accession: July 9, 1970 | April 27, 1971 | |
| Italy | October 8, 1968 | Ratification: May 2, 1975 | August 12, 1975 | |
| Kazakhstan | | Accession: August 7, 2002 | November 7, 2002 | |
| Kenya | October 8, 1968 | | | |
| Kyrgyzstan | | Accession: September 10, 1998 | December 10, 1998 | |
| Latvia | | Accession: January 14, 2005 | April 14, 2005 | |
| Liechtenstein | October 8, 1968 | | | |
| Luxembourg | October 8, 1968 | | | |
| Malawi | | Accession: July 24, 1995 | October 24, 1995 | |
| Mexico | | Accession: October 26, 2000 | January 26, 2001 | |
| Monaco | October 8, 1968 | | | |
| Mongolia | | Accession: March 16, 2001 | June 16, 2001 | |
| Montenegro | | Declaration of Continued Application: December 4, 2006 | June 3, 2006 | Details |
| Netherlands | October 8, 1968 | Ratification: December 23, 1976 | March 30, 1977 | Details |
| Norway | October 8, 1968 | Ratification: January 27, 1971 | April 27, 1971 | |
| Portugal | October 8, 1968 | | | |
| Republic of Korea | | Accession: January 17, 2011 | April 17, 2011 | |
| Republic of Moldova | | Accession: September 1, 1997 | December 1, 1997 | |
| Romania | | Accession: March 31, 1998 | June 30, 1998 | |
| Russian Federation | May 28, 1969 | Ratification: September 8, 1972 | December 15, 1972 | Details |
| Serbia | | Declaration of Continued Application: September 19, 2006 | April 27, 1992 | Details |
| Slovakia | | Declaration of Continued Application: December 30, 1992 | January 1, 1993 | Details |
| Slovenia | | Declaration of Continued Application: June 12, 1992 | June 25, 1991 | Details |
| Spain | October 8, 1968 | Ratification: August 10, 1973 | November 17, 1973 | |
| Sweden | June 2, 1969 | Ratification: July 7, 1970 | April 27, 1971 | |
| Switzerland | October 8, 1968 | Ratification: January 27, 1971 | April 27, 1971 | |
| Tajikistan | | Declaration of Continued Application: February 14, 1994 | December 25, 1991 | Details |
| the former Yugoslav Republic of Macedonia | | Declaration / Notification of Succession: July 23, 1993 | September 8, 1991 | Details |
| Trinidad and Tobago | | Accession: December 20, 1995 | March 20, 1996 | |
| Turkey | | Accession: August 31, 1998 | November 30, 1998 | |
| Turkmenistan | | Accession: March 7, 2006 | June 7, 2006 | |
| Ukraine | | Accession: April 7, 2009 | July 7, 2009 | |
| United Kingdom | | Accession: July 21, 2003 | October 21, 2003 | |
| Uruguay | | Accession: October 19, 1999 | January 19, 2000 | |
| Uzbekistan | | Accession: April 19, 2006 | July 19, 2006 | |