| Contracting Parties/Signatories | Signature | Instrument | In Force | Details |
| Afghanistan | | Accession: November 10, 2009 | May 10, 2010 | |
| Albania | | Accession: July 16, 1993 | January 16, 1994 | |
| Algeria | | Accession: August 16, 1989 | February 16, 1990 | |
| Antigua and Barbuda | | Accession: October 6, 1986 | April 6, 1987 | |
| Argentina | | Accession: November 26, 1986 | May 26, 1987 | Details |
| Armenia | | Accession: June 7, 1993 | December 7, 1993 | |
| Australia | December 7, 1978 | Ratification: June 21, 1991 | December 21, 1991 | |
| Austria | December 12, 1977 | Ratification: August 13, 1982 | February 13, 1983 | Details |
| Bahamas | | Accession: April 10, 1980 | October 10, 1980 | |
| Bahrain | | Accession: October 30, 1986 | April 30, 1987 | |
| Bangladesh | | Accession: September 8, 1980 | March 8, 1981 | |
| Barbados | | Accession: February 19, 1990 | August 19, 1990 | |
| Belarus | December 12, 1977 | Ratification: October 23, 1989 | April 23, 1990 | Details |
| Belgium | December 12, 1977 | Ratification: May 20, 1986 | November 20, 1986 | |
| Belize | | Accession: June 29, 1984 | December 29, 1984 | |
| Benin | | Accession: May 28, 1986 | November 28, 1986 | |
| Bolivia (Plurinational State of) | | Accession: December 8, 1983 | June 8, 1984 | |
| Bosnia and Herzegovina | | Declaration / Notification of Succession: December 31, 1992 | March 6, 1992 | |
| Botswana | | Accession: May 23, 1979 | November 23, 1979 | |
| Brazil | | Accession: May 5, 1992 | November 5, 1992 | |
| Brunei Darussalam | | Accession: October 14, 1991 | April 14, 1992 | |
| Bulgaria | December 11, 1978 | Ratification: September 26, 1989 | March 26, 1990 | |
| Burkina Faso | January 11, 1978 | Ratification: October 20, 1987 | April 20, 1988 | Details |
| Burundi | | Accession: June 10, 1993 | December 10, 1993 | |
| Cambodia | | Accession: January 14, 1998 | July 14, 1998 | |
| Cameroon | | Accession: March 16, 1984 | September 16, 1984 | |
| Canada | December 12, 1977 | Ratification: November 20, 1990 | May 20, 1991 | Details |
| Cape Verde | | Accession: March 16, 1995 | September 16, 1995 | |
| Central African Republic | | Accession: November 17, 1984 | January 17, 1985 | |
| Chad | | Accession: January 17, 1997 | July 17, 1997 | |
| Chile | December 12, 1977 | Ratification: April 24, 1991 | October 24, 1991 | |
| China | | Accession: September 14, 1983 | March 14, 1984 | Details |
| Colombia | | Accession: August 14, 1995 | February 14, 1996 | |
| Comoros | | Accession: November 21, 1985 | May 21, 1986 | |
| Congo | | Accession: November 10, 1983 | May 10, 1984 | |
| Cook Islands | | Accession: May 7, 2002 | November 7, 2002 | |
| Costa Rica | | Accession: December 15, 1983 | June 15, 1984 | |
| Côte d'Ivoire | December 12, 1977 | Ratification: September 20, 1989 | March 20, 1990 | |
| Croatia | | Declaration / Notification of Succession: May 11, 1992 | October 8, 1991 | |
| Cuba | | Accession: June 23, 1999 | December 23, 1999 | |
| Cyprus | | Accession: March 18, 1996 | September 18, 1996 | |
| Czech Republic | | Declaration / Notification of Succession: February 5, 1993 | January 1, 1993 | |
| Democratic Republic of the Congo | | Accession: December 12, 2002 | June 12, 2003 | |
| Denmark | December 12, 1977 | Ratification: June 17, 1982 | December 17, 1982 | |
| Djibouti | | Accession: April 8, 1991 | October 8, 1991 | |
| Dominica | | Accession: April 25, 1996 | October 25, 1996 | |
| Dominican Republic | | Accession: May 26, 1994 | November 26, 1994 | |
| Ecuador | December 12, 1977 | Ratification: April 10, 1979 | October 10, 1979 | |
| Egypt | December 12, 1977 | Ratification: October 9, 1992 | April 9, 1993 | Details |
| El Salvador | December 12, 1977 | Ratification: November 23, 1978 | May 23, 1979 | |
| Equatorial Guinea | | Accession: July 24, 1986 | January 24, 1987 | |
| Estonia | | Accession: January 18, 1993 | July 18, 1993 | |
| Ethiopia | | Accession: April 8, 1994 | October 8, 1994 | |
| Fiji | | Accession: July 30, 2008 | January 30, 2009 | |
| Finland | December 12, 1977 | Ratification: August 7, 1980 | February 7, 1981 | |
| France | | Accession: February 24, 1984 | August 24, 1984 | Details |
| Gabon | | Accession: April 8, 1980 | October 8, 1980 | |
| Gambia | | Accession: January 12, 1989 | July 12, 1989 | |
| Georgia | | Accession: September 14, 1993 | March 14, 1994 | |
| Germany | December 23, 1977 | Ratification: February 14, 1991 | August 14, 1991 | Details |
| Ghana | December 12, 1977 | Ratification: February 28, 1978 | December 7, 1978 | |
| Greece | | Accession: February 15, 1993 | August 15, 1993 | |
| Grenada | | Accession: September 23, 1998 | March 23, 1999 | |
| Guatemala | December 12, 1977 | Ratification: October 19, 1987 | April 19, 1988 | |
| Guinea | | Accession: July 11, 1984 | January 11, 1985 | |
| Guinea-Bissau | | Accession: October 21, 1986 | April 21, 1987 | |
| Guyana | | Accession: January 18, 1988 | July 18, 1988 | |
| Haiti | | Accession: December 20, 2006 | June 20, 2007 | |
| Holy See | December 12, 1977 | Ratification: November 21, 1985 | May 21, 1986 | Details |
| Honduras | December 12, 1977 | Ratification: February 16, 1995 | August 16, 1995 | |
| Hungary | December 12, 1977 | Ratification: April 12, 1989 | October 12, 1989 | |
| Iceland | December 12, 1977 | Ratification: April 10, 1987 | October 10, 1987 | |
| Iran (Islamic Republic of) | December 12, 1977 | | | |
| Ireland | December 12, 1977 | Ratification: May 19, 1999 | November 19, 1999 | Details |
| Italy | December 12, 1977 | Ratification: February 27, 1986 | August 27, 1986 | |
| Jamaica | | Accession: July 29, 1986 | January 29, 1987 | |
| Japan | | Accession: August 31, 2004 | February 28, 2005 | |
| Jordan | December 12, 1977 | Ratification: May 1, 1979 | November 1, 1979 | |
| Kazakhstan | | Declaration / Notification of Succession: May 5, 1992 | December 21, 1991 | |
| Kenya | | Accession: February 23, 1999 | August 23, 1999 | |
| Kuwait | | Accession: January 17, 1985 | July 17, 1985 | |
| Kyrgyzstan | | Declaration / Notification of Succession: September 18, 1992 | December 21, 1991 | |
| Lao People's Democratic Republic | April 18, 1978 | Ratification: November 18, 1980 | May 18, 1981 | |
| Latvia | | Accession: December 24, 1991 | June 24, 1992 | |
| Lebanon | | Accession: July 23, 1997 | January 23, 1998 | |
| Lesotho | | Accession: May 20, 1994 | November 20, 1994 | |
| Liberia | | Accession: June 30, 1988 | December 30, 1988 | |
| Libya | | Accession: June 7, 1978 | December 7, 1978 | |
| Liechtenstein | December 12, 1977 | Ratification: August 10, 1989 | February 10, 1990 | Details |
| Lithuania | | Accession: July 13, 2000 | January 13, 2001 | |
| Luxembourg | December 12, 1977 | Ratification: August 29, 1989 | February 28, 1990 | |
| Madagascar | October 13, 1978 | Ratification: May 8, 1992 | November 8, 1992 | |
| Malawi | | Accession: October 7, 1991 | April 7, 1992 | |
| Maldives | | Accession: September 3, 1991 | March 3, 1992 | |
| Mali | | Accession: February 8, 1989 | August 8, 1989 | |
| Malta | | Accession: April 17, 1989 | October 17, 1989 | Details |
| Mauritania | | Accession: March 14, 1980 | September 14, 1980 | |
| Mauritius | | Accession: March 22, 1982 | September 22, 1982 | Details |
| Micronesia (Federated States of) | | Accession: September 19, 1995 | March 19, 1996 | |
| Monaco | | Accession: January 7, 2000 | July 7, 2000 | |
| Mongolia | December 12, 1977 | Ratification: December 6, 1995 | June 6, 1996 | |
| Montenegro | | Accession: August 2, 2006 | February 2, 2007 | |
| Morocco | December 12, 1977 | Ratification: June 3, 2011 | December 3, 2011 | |
| Mozambique | | Accession: November 12, 2002 | May 12, 2003 | |
| Namibia | | Accession: October 18, 1983 | April 18, 1984 | Details |
| Nauru | | Accession: June 27, 2006 | December 27, 2006 | |
| Netherlands | December 12, 1977 | Ratification: June 26, 1987 | December 26, 1987 | Details |
| New Zealand | November 27, 1978 | Ratification: February 8, 1988 | August 8, 1988 | Details |
| Nicaragua | December 12, 1977 | Ratification: July 19, 1999 | January 19, 2000 | |
| Niger | June 16, 1978 | Ratification: June 8, 1979 | December 8, 1979 | |
| Nigeria | | Accession: October 10, 1988 | April 10, 1989 | |
| Norway | December 12, 1977 | Ratification: December 14, 1981 | June 14, 1982 | |
| Oman | | Accession: March 29, 1984 | September 29, 1984 | Details |
| Pakistan | December 12, 1977 | | | |
| Palau | | Accession: June 25, 1996 | December 25, 1996 | |
| Palestine | | | | Details |
| Panama | December 12, 1977 | Ratification: September 18, 1995 | March 18, 1996 | |
| Paraguay | | Accession: November 30, 1990 | May 30, 1991 | |
| Peru | December 12, 1977 | Ratification: July 14, 1989 | January 14, 1990 | |
| Philippines | | Accession: December 11, 1986 | June 11, 1987 | |
| Poland | December 12, 1977 | Ratification: October 23, 1991 | April 23, 1992 | |
| Portugal | December 12, 1977 | Ratification: May 27, 1992 | November 27, 1992 | Details |
| Qatar | | Accession: January 5, 2005 | July 5, 2005 | |
| Republic of Korea | December 7, 1977 | Ratification: January 15, 1982 | July 15, 1982 | |
| Republic of Moldova | | Accession: May 24, 1993 | November 24, 1993 | |
| Romania | March 28, 1978 | Ratification: June 21, 1990 | December 21, 1990 | |
| Russian Federation | December 12, 1977 | Ratification: September 29, 1989 | March 29, 1990 | Details |
| Rwanda | | Accession: November 19, 1984 | May 19, 1985 | |
| Saint Kitts and Nevis | | Accession: February 14, 1986 | August 14, 1986 | |
| Saint Lucia | | Accession: October 7, 1982 | April 7, 1983 | |
| Saint Vincent and the Grenadines | | Accession: April 8, 1983 | October 8, 1983 | |
| Samoa | | Accession: August 23, 1984 | February 23, 1985 | |
| San Marino | June 22, 1978 | Ratification: April 5, 1994 | October 5, 1994 | |
| Sao Tome and Principe | | Accession: July 5, 1996 | January 5, 1997 | |
| Saudi Arabia | | Accession: November 28, 2001 | May 28, 2002 | |
| Senegal | December 12, 1977 | Ratification: May 7, 1985 | November 7, 1985 | |
| Serbia | | Declaration / Notification of Succession: October 16, 2001 | April 27, 1992 | |
| Seychelles | | Accession: November 8, 1984 | May 8, 1985 | |
| Sierra Leone | | Accession: October 21, 1986 | April 21, 1987 | |
| Slovakia | | Declaration / Notification of Succession: April 2, 1993 | January 1, 1993 | |
| Slovenia | | Declaration / Notification of Succession: March 26, 1992 | June 25, 1991 | |
| Solomon Islands | | Accession: September 19, 1988 | March 19, 1989 | |
| South Africa | | Accession: November 21, 1995 | May 21, 1996 | |
| South Sudan | | Accession: January 25, 2013 | July 25, 2013 | |
| Spain | November 7, 1978 | Ratification: April 21, 1989 | October 21, 1989 | |
| Sudan | | Accession: July 13, 2006 | January 13, 2007 | |
| Suriname | | Accession: December 16, 1985 | June 16, 1986 | |
| Swaziland | | Accession: November 2, 1995 | May 2, 1996 | |
| Sweden | December 12, 1977 | Ratification: August 31, 1979 | February 29, 1980 | |
| Switzerland | December 12, 1977 | Ratification: February 17, 1982 | August 17, 1982 | |
| Tajikistan | | Declaration / Notification of Succession: January 13, 1993 | December 21, 1991 | |
| the former Yugoslav Republic of Macedonia | | Declaration / Notification of Succession: September 1, 1993 | September 8, 1991 | |
| Timor-Leste | | Accession: April 12, 2005 | October 12, 2005 | |
| Togo | June 21, 1984 | Ratification: June 21, 1984 | December 21, 1984 | |
| Tonga | | Accession: January 20, 2003 | July 20, 2003 | |
| Trinidad and Tobago | | Accession: July 20, 2001 | January 20, 2002 | |
| Tunisia | December 12, 1977 | Ratification: August 9, 1979 | February 9, 1980 | |
| Turkmenistan | | Declaration / Notification of Succession: April 10, 1992 | December 26, 1991 | |
| Uganda | | Accession: March 13, 1991 | September 13, 1991 | |
| Ukraine | December 12, 1977 | Ratification: January 25, 1990 | July 25, 1990 | Details |
| United Arab Emirates | | Accession: March 9, 1983 | September 9, 1983 | Details |
| United Kingdom | December 12, 1977 | Ratification: January 28, 1998 | July 28, 1998 | Details |
| United Republic of Tanzania | | Accession: February 15, 1983 | August 15, 1983 | |
| United States of America | December 12, 1977 | | | |
| Uruguay | | Accession: December 13, 1985 | June 13, 1986 | |
| Uzbekistan | | Accession: October 8, 1993 | April 8, 1994 | |
| Vanuatu | | Accession: February 28, 1985 | August 28, 1985 | |
| Venezuela (Bolivarian Republic of) | | Accession: July 23, 1998 | January 23, 1999 | |
| Yemen | February 14, 1978 | Ratification: April 17, 1990 | October 17, 1990 | Details |
| Zambia | | Accession: May 4, 1995 | November 4, 1995 | |
| Zimbabwe | | Accession: October 19, 1992 | April 19, 1993 | |