| Contracting Party | Signature | Instrument | In Force | Details |
|---|
| Albania | | Accession: March 26, 2001 | June 26, 2001 | |
| Argentina | | Accession: March 19, 1973 | June 30, 1973 | |
| Armenia | | Accession: October 31, 2002 | January 31, 2003 | |
| Australia | | Accession: March 12, 1974 | June 22, 1974 | |
| Austria | April 28, 1972 | Ratification: May 6, 1982 | August 21, 1982 | |
| Azerbaijan | | Accession: June 1, 2001 | September 1, 2001 | |
| Barbados | | Accession: March 23, 1983 | July 29, 1983 | |
| Belarus | | Accession: January 17, 2003 | April 17, 2003 | |
| Bosnia and Herzegovina | March 1, 1992 | Ratification: February 19, 2009 | May 25, 2009 | Details |
| Brazil | October 29, 1971 | Ratification: August 6, 1975 | November 28, 1975 | |
| Bulgaria | | Accession: May 31, 1995 | September 6, 1995 | |
| Burkina Faso | | Accession: October 14, 1987 | January 30, 1988 | |
| Canada | October 29, 1971 | | | |
| Chile | | Accession: December 15, 1976 | March 24, 1977 | |
| China | | Accession: January 5, 1993 | April 30, 1993 | Details |
| Colombia | October 29, 1971 | Ratification: February 14, 1994 | May 16, 1994 | |
| Costa Rica | | Accession: March 1, 1982 | June 17, 1982 | |
| Croatia | | Accession: January 20, 2000 | April 20, 2000 | |
| Cyprus | | Accession: June 25, 1993 | September 30, 1993 | |
| Czech Republic | | Declaration / Notification of Succession: September 30, 1993 | January 1, 1993 | Details |
| Democratic Republic of the Congo | | Accession: July 25, 1977 | November 29, 1977 | Details |
| Denmark | October 29, 1971 | Ratification: December 7, 1976 | March 24, 1977 | |
| Ecuador | October 29, 1971 | Ratification: June 4, 1974 | September 14, 1974 | |
| Egypt | | Accession: December 15, 1977 | April 23, 1978 | Details |
| El Salvador | | Accession: October 25, 1978 | February 9, 1979 | |
| Estonia | | Accession: February 28, 2000 | May 28, 2000 | |
| Fiji | | Accession: June 15, 1972 | April 18, 1973 | |
| Finland | April 21, 1972 | Ratification: December 18, 1972 | April 18, 1973 | Details |
| France | October 29, 1971 | Ratification: September 12, 1972 | April 18, 1973 | |
| Germany | October 29, 1971 | Ratification: February 7, 1974 | May 18, 1974 | Details |
| Greece | | Accession: November 2, 1993 | February 9, 1994 | |
| Guatemala | | Accession: October 14, 1976 | February 1, 1977 | |
| Holy See | October 29, 1971 | Ratification: April 4, 1977 | July 18, 1977 | |
| Honduras | | Accession: November 16, 1989 | March 6, 1990 | |
| Hungary | | Accession: February 24, 1975 | May 28, 1975 | Details |
| India | October 29, 1971 | Ratification: November 1, 1974 | February 12, 1975 | |
| Iran (Islamic Republic of) | October 29, 1971 | | | |
| Israel | October 29, 1971 | Ratification: January 10, 1978 | May 1, 1978 | |
| Italy | October 29, 1971 | Ratification: December 20, 1976 | March 24, 1977 | Details |
| Jamaica | | Accession: October 7, 1993 | January 11, 1994 | |
| Japan | April 21, 1972 | Acceptance: June 19, 1978 | October 14, 1978 | |
| Kazakhstan | | Accession: May 3, 2001 | August 3, 2001 | |
| Kenya | April 4, 1972 | Ratification: January 6, 1976 | April 21, 1976 | |
| Kyrgyzstan | | Accession: July 12, 2002 | October 12, 2002 | |
| Latvia | | Accession: April 29, 1997 | August 23, 1997 | |
| Liberia | | Accession: September 16, 2005 | December 16, 2005 | |
| Liechtenstein | April 28, 1972 | Ratification: July 12, 1999 | October 12, 1999 | |
| Lithuania | | Accession: October 27, 1999 | January 27, 2000 | |
| Luxembourg | October 29, 1971 | Ratification: November 25, 1975 | March 8, 1976 | |
| Mexico | October 29, 1971 | Ratification: September 11, 1973 | December 21, 1973 | |
| Monaco | October 29, 1971 | Ratification: August 21, 1974 | December 2, 1974 | |
| Montenegro | | Declaration / Notification of Succession: October 23, 2006 | June 3, 2006 | Details |
| Netherlands | | Accession: July 7, 1993 | October 12, 1993 | Details |
| New Zealand | | Accession: May 3, 1976 | August 13, 1976 | |
| Nicaragua | October 29, 1971 | Ratification: May 10, 2000 | August 10, 2000 | |
| Norway | April 28, 1972 | Ratification: April 10, 1978 | August 1, 1978 | |
| Panama | April 28, 1972 | Ratification: March 20, 1974 | June 29, 1974 | |
| Paraguay | | Accession: October 30, 1978 | February 13, 1979 | |
| Peru | | Accession: May 7, 1985 | August 24, 1985 | |
| Philippines | April 29, 1972 | | | |
| Republic of Korea | | Accession: July 1, 1987 | October 10, 1987 | |
| Republic of Moldova | | Accession: April 17, 2000 | July 17, 2000 | |
| Romania | | Accession: July 1, 1998 | October 1, 1998 | |
| Russian Federation | | Accession: December 9, 1994 | March 13, 1995 | |
| Saint Lucia | | Accession: January 2, 2001 | April 2, 2001 | |
| Serbia | October 29, 1971 | Ratification: March 10, 2003 | June 10, 2003 | Details |
| Slovakia | | Declaration / Notification of Succession: May 28, 1993 | January 1, 1993 | Details |
| Slovenia | | Accession: July 9, 1996 | October 15, 1996 | |
| Spain | October 29, 1971 | Ratification: May 16, 1974 | August 24, 1974 | |
| Sweden | October 29, 1971 | Ratification: January 18, 1973 | April 18, 1973 | Details |
| Switzerland | October 29, 1971 | Ratification: June 24, 1993 | September 30, 1993 | |
| Tajikistan | | Accession: November 26, 2012 | February 26, 2013 | |
| the former Yugoslav Republic of Macedonia | | Accession: December 2, 1997 | March 2, 1998 | |
| Togo | | Accession: March 10, 2003 | June 10, 2003 | |
| Trinidad and Tobago | | Accession: June 27, 1988 | October 1, 1988 | |
| Ukraine | | Accession: November 18, 1999 | February 18, 2000 | |
| United Kingdom | October 29, 1971 | Ratification: December 5, 1972 | April 18, 1973 | Details |
| United States of America | October 29, 1971 | Ratification: November 26, 1973 | March 10, 1974 | |
| Uruguay | October 29, 1971 | Ratification: October 6, 1982 | January 18, 1983 | |
| Venezuela (Bolivarian Republic of) | | Accession: July 30, 1982 | November 18, 1982 | Details |
| Viet Nam | | Accession: April 6, 2005 | July 6, 2005 | |
