| Contracting Party | Signature | Instrument | In Force | Details |
|---|
| Afghanistan | | Accession: February 14, 2017 | May 14, 2017 | Details |
| Albania | | Accession: July 4, 1995 | October 4, 1995 | Details |
| Algeria | | Accession: September 16, 1965 | March 1, 1966 | Details |
| Andorra | | Accession: March 2, 2004 | June 2, 2004 | Details |
| Angola | | Accession: September 27, 2007 | December 27, 2007 | Details |
| Antigua and Barbuda | | Accession: December 17, 1999 | March 17, 2000 | Details |
| Argentina | | Accession: December 27, 1966 | February 10, 1967 | Details |
| Armenia | | Declaration of Continued Application: May 17, 1994 | December 25, 1991 | Details |
| Australia | | Accession: July 30, 1925 | October 10, 1925 | Details |
| Austria | | Accession: November 30, 1908 | January 1, 1909 | Details |
| Azerbaijan | | Accession: September 25, 1995 | December 25, 1995 | Details |
| Bahamas | | Declaration of Continued Application: July 5, 1976 | July 10, 1973 | Details |
| Bahrain | | Accession: July 29, 1997 | October 29, 1997 | Details |
| Bangladesh | | Accession: November 29, 1990 | March 3, 1991 | Details |
| Barbados | | Accession: December 12, 1984 | March 12, 1985 | Details |
| Belarus | | Declaration of Continued Application: April 14, 1993 | December 25, 1991 | Details |
| Belgium | March 20, 1883 | Ratification: June 6, 1884 | July 7, 1884 | Details |
| Belize | | Accession: March 17, 2000 | June 17, 2000 | Details |
| Benin | | Accession: September 22, 1966 | January 10, 1967 | Details |
| Bhutan | | Accession: May 4, 2000 | August 4, 2000 | Details |
| Bolivia (Plurinational State of) | | Accession: August 4, 1993 | November 4, 1993 | Details |
| Bosnia and Herzegovina | | Declaration of Continued Application: June 2, 1993 | March 1, 1992 | Details |
| Botswana | | Accession: January 15, 1998 | April 15, 1998 | Details |
| Brazil | March 20, 1883 | Ratification: June 6, 1884 | July 7, 1884 | Details |
| Brunei Darussalam | | Accession: November 17, 2011 | February 17, 2012 | Details |
| Bulgaria | | Accession: April 30, 1921 | June 13, 1921 | Details |
| Burkina Faso | | Accession: September 17, 1963 | November 19, 1963 | Details |
| Burundi | | Accession: May 31, 1977 | September 3, 1977 | Details |
| Cambodia | | Accession: June 22, 1998 | September 22, 1998 | Details |
| Cameroon | | Accession: February 10, 1964 | May 10, 1964 | Details |
| Canada | | Accession: August 21, 1923 | September 1, 1923 | Details |
| Central African Republic | | Accession: October 5, 1963 | November 19, 1963 | Details |
| Chad | | Accession: September 11, 1963 | November 19, 1963 | Details |
| Chile | | Accession: March 13, 1991 | June 14, 1991 | Details |
| China | | Accession: December 19, 1984 | March 19, 1985 | Details |
| Colombia | | Accession: June 3, 1996 | September 3, 1996 | Details |
| Comoros | | Accession: January 3, 2005 | April 3, 2005 | Details |
| Congo | | Accession: June 26, 1963 | September 2, 1963 | Details |
| Costa Rica | | Accession: July 28, 1995 | October 31, 1995 | Details |
| Côte d'Ivoire | | Accession: August 9, 1963 | October 23, 1963 | Details |
| Croatia | | Declaration / Notification of Succession: July 28, 1992 | October 8, 1991 | Details |
| Cuba | | Accession: September 22, 1904 | November 17, 1904 | Details |
| Cyprus | | Accession: December 17, 1965 | January 17, 1966 | Details |
| Czech Republic | | Declaration of Continued Application: December 18, 1992 | January 1, 1993 | Details |
| Democratic People's Republic of Korea | | Accession: March 7, 1980 | June 10, 1980 | Details |
| Democratic Republic of the Congo | | Accession: October 28, 1974 | January 31, 1975 | Details |
| Denmark | | Accession: October 1, 1894 | October 1, 1894 | Details |
| Djibouti | | Accession: February 13, 2002 | May 13, 2002 | Details |
| Dominica | | Accession: May 7, 1999 | August 7, 1999 | Details |
| Dominican Republic | | Accession: October 20, 1884 | July 11, 1890 | Details |
| Ecuador | | Accession: March 22, 1999 | June 22, 1999 | Details |
| Egypt | | Accession: March 5, 1951 | July 1, 1951 | Details |
| El Salvador | | Accession: November 18, 1993 | February 19, 1994 | Details |
| Equatorial Guinea | | Accession: March 26, 1997 | June 26, 1997 | Details |
| Estonia | | Accession: May 24, 1994 | August 24, 1994 | Details |
| Finland | | Accession: August 2, 1921 | September 20, 1921 | Details |
| France | March 20, 1883 | Ratification: June 6, 1884 | July 7, 1884 | Details |
| Gabon | | Accession: November 16, 1963 | February 29, 1964 | Details |
| Gambia | | Accession: October 21, 1991 | January 21, 1992 | Details |
| Georgia | | Declaration of Continued Application: January 18, 1994 | December 25, 1991 | Details |
| Germany | | Accession: May 1, 1903 | May 1, 1903 | Details |
| Ghana | | Accession: June 28, 1976 | September 28, 1976 | Details |
| Greece | | Accession: August 18, 1924 | October 2, 1924 | Details |
| Grenada | | Accession: June 22, 1998 | September 22, 1998 | Details |
| Guatemala | | Accession: May 18, 1998 | August 18, 1998 | Details |
| Guinea | | Accession: October 30, 1981 | February 5, 1982 | Details |
| Guinea-Bissau | | Accession: March 28, 1988 | June 28, 1988 | Details |
| Guyana | | Accession: July 25, 1994 | October 25, 1994 | Details |
| Haiti | | Accession: February 19, 1958 | July 1, 1958 | Details |
| Holy See | | Accession: July 21, 1960 | September 29, 1960 | Details |
| Honduras | | Accession: November 3, 1993 | February 4, 1994 | Details |
| Hungary | | Accession: November 30, 1908 | January 1, 1909 | Details |
| Iceland | | Accession: January 31, 1962 | May 5, 1962 | Details |
| India | | Accession: September 7, 1998 | December 7, 1998 | Details |
| Indonesia | | Declaration of Continued Application: August 15, 1950 | December 24, 1950 | Details |
| Iran (Islamic Republic of) | | Accession: September 1, 1959 | December 16, 1959 | Details |
| Iraq | | Accession: October 21, 1975 | January 24, 1976 | Details |
| Ireland | | Accession: October 22, 1925 | December 4, 1925 | Details |
| Israel | | Accession: December 14, 1949 | March 24, 1950 | Details |
| Italy | March 20, 1883 | Ratification: June 6, 1884 | July 7, 1884 | Details |
| Jamaica | | Accession: September 24, 1999 | December 24, 1999 | Details |
| Japan | | Accession: April 18, 1899 | July 15, 1899 | Details |
| Jordan | | Accession: April 12, 1972 | July 17, 1972 | Details |
| Kazakhstan | | Declaration of Continued Application: February 16, 1993 | December 25, 1991 | Details |
| Kenya | | Accession: May 14, 1965 | June 14, 1965 | Details |
| Kuwait | | Accession: September 2, 2014 | December 2, 2014 | Details |
| Kyrgyzstan | | Declaration of Continued Application: February 14, 1994 | December 25, 1991 | Details |
| Lao People's Democratic Republic | | Accession: July 8, 1998 | October 8, 1998 | Details |
| Latvia | | Accession: June 7, 1993 | September 7, 1993 | Details |
| Lebanon | | Accession: June 18, 1924 | September 1, 1924 | Details |
| Lesotho | | Accession: June 27, 1989 | September 28, 1989 | Details |
| Liberia | | Accession: May 27, 1994 | August 27, 1994 | Details |
| Libya | | Accession: June 28, 1976 | September 28, 1976 | Details |
| Liechtenstein | | Accession: May 8, 1933 | July 14, 1933 | Details |
| Lithuania | | Accession: February 21, 1994 | May 22, 1994 | Details |
| Luxembourg | | Accession: May 12, 1922 | June 30, 1922 | Details |
| Madagascar | | Accession: October 7, 1963 | December 21, 1963 | Details |
| Malawi | | Declaration of Continued Application: May 24, 1965 | July 6, 1964 | Details |
| Malaysia | | Accession: June 23, 1988 | January 1, 1989 | Details |
| Mali | | Accession: October 14, 1982 | March 1, 1983 | Details |
| Malta | | Accession: August 29, 1967 | October 20, 1967 | Details |
| Mauritania | | Accession: October 26, 1964 | April 11, 1965 | Details |
| Mauritius | | Accession: June 21, 1976 | September 24, 1976 | Details |
| Mexico | | Accession: July 20, 1903 | September 7, 1903 | Details |
| Monaco | | Accession: February 9, 1956 | April 29, 1956 | Details |
| Mongolia | | Accession: January 16, 1985 | April 21, 1985 | Details |
| Montenegro | | Declaration of Continued Application: December 4, 2006 | June 3, 2006 | Details |
| Morocco | | Accession: February 27, 1917 | July 30, 1917 | Details |
| Mozambique | | Accession: April 9, 1998 | July 9, 1998 | Details |
| Namibia | | Accession: December 29, 2003 | January 1, 2004 | Details |
| Nepal | | Accession: March 22, 2001 | June 22, 2001 | Details |
| Netherlands | March 20, 1883 | Ratification: June 6, 1884 | July 7, 1884 | Details |
| New Zealand | | Accession: June 10, 1931 | July 29, 1931 | Details |
| Nicaragua | | Accession: April 3, 1996 | July 3, 1996 | Details |
| Niger | | Accession: September 10, 1963 | July 5, 1964 | Details |
| Nigeria | | Accession: July 17, 1963 | September 2, 1963 | Details |
| Norway | | Accession: May 29, 1885 | July 1, 1885 | Details |
| Oman | | Accession: April 14, 1999 | July 14, 1999 | Details |
| Pakistan | | Accession: April 22, 2004 | July 22, 2004 | Details |
| Panama | | Accession: July 19, 1996 | October 19, 1996 | Details |
| Papua New Guinea | | Accession: March 15, 1999 | June 15, 1999 | Details |
| Paraguay | | Accession: February 25, 1994 | May 28, 1994 | Details |
| Peru | | Accession: January 11, 1995 | April 11, 1995 | Details |
| Philippines | | Accession: August 12, 1965 | September 27, 1965 | Details |
| Poland | | Accession: June 24, 1919 | November 10, 1919 | Details |
| Portugal | March 20, 1883 | Ratification: June 6, 1884 | July 7, 1884 | Details |
| Qatar | | Accession: April 5, 2000 | July 5, 2000 | Details |
| Republic of Korea | | Accession: February 1, 1980 | May 4, 1980 | Details |
| Republic of Moldova | | Declaration of Continued Application: June 3, 1993 | December 25, 1991 | Details |
| Romania | | Accession: August 26, 1920 | October 6, 1920 | Details |
| Russian Federation | | Accession: March 16, 1965 | July 1, 1965 | Details |
| Rwanda | | Accession: November 3, 1983 | March 1, 1984 | Details |
| Saint Kitts and Nevis | | Accession: January 3, 1995 | April 9, 1995 | Details |
| Saint Lucia | | Accession: March 9, 1995 | June 9, 1995 | Details |
| Saint Vincent and the Grenadines | | Accession: May 29, 1995 | August 29, 1995 | Details |
| Samoa | | Accession: June 21, 2013 | September 21, 2013 | Details |
| San Marino | | Accession: December 16, 1959 | March 4, 1960 | Details |
| Sao Tome and Principe | | Accession: February 12, 1998 | May 12, 1998 | Details |
| Saudi Arabia | | Accession: December 11, 2003 | March 11, 2004 | Details |
| Senegal | | Accession: October 16, 1963 | December 21, 1963 | Details |
| Serbia | | Declaration of Continued Application: September 19, 2006 | April 27, 1992 | Details |
| Seychelles | | Accession: August 7, 2002 | November 7, 2002 | Details |
| Sierra Leone | | Accession: March 17, 1997 | June 17, 1997 | Details |
| Singapore | | Accession: November 23, 1994 | February 23, 1995 | 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 |
| South Africa | | Accession: October 20, 1947 | December 1, 1947 | Details |
| Spain | March 20, 1883 | Ratification: June 6, 1884 | July 7, 1884 | Details |
| Sri Lanka | | Accession: October 9, 1952 | December 29, 1952 | Details |
| Sudan | | Accession: January 16, 1984 | April 16, 1984 | Details |
| Suriname | | Declaration of Continued Application: November 16, 1976 | November 25, 1975 | Details |
| Swaziland | | Accession: February 12, 1991 | May 12, 1991 | Details |
| Sweden | | Accession: May 29, 1885 | July 1, 1885 | Details |
| Switzerland | March 20, 1883 | Ratification: June 6, 1884 | July 7, 1884 | Details |
| Syrian Arab Republic | | Accession: June 18, 1924 | September 1, 1924 | Details |
| Tajikistan | | Declaration of Continued Application: February 14, 1994 | December 25, 1991 | Details |
| Thailand | | Accession: May 2, 2008 | August 2, 2008 | Details |
| the former Yugoslav Republic of Macedonia | | Declaration / Notification of Succession: July 23, 1993 | September 8, 1991 | Details |
| Togo | | Accession: July 11, 1967 | September 10, 1967 | Details |
| Tonga | | Accession: March 14, 2001 | June 14, 2001 | Details |
| Trinidad and Tobago | | Accession: May 14, 1964 | August 1, 1964 | Details |
| Tunisia | | Accession: March 20, 1884 | July 7, 1884 | Details |
| Turkey | | Accession: August 6, 1925 | October 10, 1925 | Details |
| Turkmenistan | | Declaration of Continued Application: March 1, 1995 | December 25, 1991 | Details |
| Uganda | | Accession: May 14, 1965 | June 14, 1965 | Details |
| Ukraine | | Declaration of Continued Application: September 21, 1992 | December 25, 1991 | Details |
| United Arab Emirates | | Accession: June 19, 1996 | September 19, 1996 | Details |
| United Kingdom | | Accession: March 17, 1884 | July 7, 1884 | Details |
| United Republic of Tanzania | | Accession: April 2, 1963 | June 16, 1963 | Details |
| United States of America | | Accession: March 18, 1887 | May 30, 1887 | Details |
| Uruguay | | Accession: January 25, 1967 | March 18, 1967 | Details |
| Uzbekistan | | Declaration of Continued Application: August 18, 1993 | December 25, 1991 | Details |
| Venezuela (Bolivarian Republic of) | | Accession: June 9, 1995 | September 12, 1995 | Details |
| Viet Nam | | | March 8, 1949 | Details |
| Yemen | | Accession: November 15, 2006 | February 15, 2007 | Details |
| Zambia | | Declaration of Continued Application: December 31, 1964 | April 6, 1965 | Details |
| Zimbabwe | | Declaration / Notification of Succession: September 29, 1981 | April 18, 1980 | Details |
