| Contracting Party | Signature | Instrument | In Force | Details |
| Argentina | March 26, 1975 | | | |
| Armenia | | Accession: September 13, 1993 | December 13, 1993 | |
| Australia | | Accession: July 26, 1990 | October 26, 1990 | |
| Austria | March 26, 1975 | Ratification: May 6, 1982 | August 6, 1982 | |
| Bahrain | | Accession: February 1, 2007 | May 1, 2007 | |
| Belgium | May 21, 1974 | | | |
| Bosnia and Herzegovina | | Declaration / Notification of Succession: January 12, 1994 | March 6, 1992 | Details |
| Brazil | May 21, 1974 | | | |
| Chile | | Accession: March 8, 2011 | June 8, 2011 | |
| Costa Rica | | Accession: March 25, 1999 | June 25, 1999 | |
| Côte d'Ivoire | May 21, 1974 | | | |
| Croatia | | Declaration / Notification of Succession: July 26, 1993 | October 8, 1991 | Details |
| Cyprus | May 21, 1974 | | | |
| El Salvador | | Accession: April 22, 2008 | July 22, 2008 | Details |
| France | March 27, 1975 | | | |
| Germany | May 21, 1975 | Ratification: May 25, 1979 | August 25, 1979 | Details |
| Greece | | Accession: July 22, 1991 | October 22, 1991 | |
| Honduras | | Accession: January 7, 2008 | April 7, 2008 | |
| Israel | May 21, 1974 | | | |
| Italy | May 21, 1974 | Ratification: April 7, 1981 | July 7, 1981 | Details |
| Jamaica | | Accession: October 12, 1999 | January 12, 2000 | |
| Kenya | May 21, 1974 | Ratification: January 6, 1976 | August 25, 1979 | |
| Lebanon | May 21, 1974 | | | |
| Mexico | May 21, 1974 | Ratification: March 18, 1976 | August 25, 1979 | |
| Montenegro | | Declaration / Notification of Succession: October 23, 2006 | June 3, 2006 | Details |
| Morocco | May 21, 1974 | Ratification: March 31, 1983 | June 30, 1983 | |
| Nicaragua | | Accession: December 1, 1975 | August 25, 1979 | |
| Oman | | Accession: December 18, 2007 | March 18, 2008 | |
| Panama | | Accession: June 25, 1985 | September 25, 1985 | |
| Peru | | Accession: May 7, 1985 | August 7, 1985 | |
| Portugal | | Accession: December 11, 1995 | March 11, 1996 | |
| Republic of Moldova | | Accession: July 28, 2008 | October 28, 2008 | |
| Russian Federation | | Accession: October 20, 1988 | January 20, 1989 | Details |
| Rwanda | | Accession: April 25, 2001 | July 25, 2001 | |
| Senegal | May 21, 1974 | | | |
| Serbia | | Declaration of Continued Application: September 19, 2006 | April 27, 1992 | Details |
| Singapore | | Accession: January 27, 2005 | April 27, 2005 | |
| Slovenia | | Declaration / Notification of Succession: November 3, 1992 | June 25, 1991 | Details |
| Spain | May 21, 1974 | | | |
| Switzerland | May 21, 1974 | Ratification: June 24, 1993 | September 24, 1993 | |
| the former Yugoslav Republic of Macedonia | | Declaration / Notification of Succession: September 2, 1997 | November 17, 1991 | Details |
| Togo | | Accession: March 10, 2003 | June 10, 2003 | |
| Trinidad and Tobago | | Accession: August 1, 1996 | November 1, 1996 | Details |
| United States of America | May 21, 1974 | Ratification: December 7, 1984 | March 7, 1985 | |
| Viet Nam | | Accession: October 12, 2005 | January 12, 2006 | |