| Contracting Parties/Signatories | Signature | Instrument | In Force | Details |
|---|
| Albania | | Accession: November 4, 2003 | February 4, 2004 | |
| Australia | | Accession: November 29, 1977 | February 28, 1978 | |
| Austria | | Accession: May 14, 1982 | August 14, 1982 | |
| Bangladesh | | Accession: May 5, 1975 | August 5, 1975 | |
| Belgium | July 28, 1971 | | | |
| Brazil | July 24, 1971 | Ratification: September 11, 1975 | December 11, 1975 | |
| Costa Rica | July 24, 1971 | | | |
| Cyprus | | Accession: September 19, 1990 | December 19, 1990 | |
| Czech Republic | | | January 1, 1993 | Details |
| Denmark | July 24, 1971 | Ratification: April 11, 1979 | July 11, 1979 | |
| Ecuador | | Accession: June 6, 1991 | September 6, 1991 | |
| El Salvador | | Accession: December 29, 1978 | March 29, 1979 | |
| Finland | November 12, 1971 | | | |
| France | July 24, 1971 | Ratification: September 11, 1972 | July 10, 1974 | |
| Germany | July 24, 1971 | Ratification: October 18, 1973 | July 10, 1974 | Details |
| Guatemala | July 24, 1971 | | | |
| Guinea | | Accession: August 13, 1981 | November 13, 1981 | |
| Holy See | July 24, 1971 | Ratification: February 6, 1980 | May 6, 1980 | |
| Hungary | July 24, 1971 | Ratification: September 15, 1972 | July 10, 1974 | |
| India | July 24, 1971 | Ratification: January 7, 1988 | April 7, 1988 | |
| Israel | July 24, 1971 | | | |
| Italy | July 24, 1971 | Ratification: October 25, 1979 | January 25, 1980 | |
| Japan | October 22, 1971 | Ratification: July 21, 1977 | October 21, 1977 | Details |
| Kenya | | Ratification: January 4, 1974 | July 10, 1974 | |
| Liechtenstein | | Accession: August 11, 1999 | November 11, 1999 | |
| Monaco | | Ratification: September 13, 1974 | | |
| Morocco | | Accession: October 28, 1975 | January 28, 1976 | |
| Netherlands | July 24, 1971 | Ratification: August 30, 1985 | November 30, 1985 | Details |
| Niger | | Accession: February 15, 1989 | May 15, 1989 | |
| Norway | November 20, 1971 | Ratification: August 13, 1974 | August 13, 1974 | |
| Peru | | Accession: April 22, 1985 | July 22, 1985 | |
| Poland | | Accession: December 9, 1976 | March 9, 1977 | |
| Portugal | | Accession: April 30, 1981 | | Details |
| Republic of Korea | | Accession: July 1, 1987 | October 1, 1987 | |
| Russian Federation | | Accession: December 9, 1994 | December 9, 1995 | |
| Rwanda | | Accession: August 10, 1989 | November 10, 1989 | |
| Saint Vincent and the Grenadines | | | January 22, 1985 | Details |
| Senegal | | Accession: April 9, 1974 | July 10, 1974 | |
| Serbia | July 24, 1971 | | | Details |
| Slovakia | | | January 1, 1993 | Details |
| Slovenia | | | December 16, 1992 | Details |
| Spain | July 24, 1971 | Ratification: April 10, 1974 | July 10, 1974 | |
| Sri Lanka | | Accession: July 27, 1988 | July 27, 1988 | |
| Sweden | July 24, 1971 | Ratification: June 27, 1973 | July 10, 1974 | |
| Switzerland | July 24, 1971 | Ratification: June 21, 1993 | September 21, 1993 | |
| Tunisia | July 24, 1971 | Ratification: March 10, 1975 | June 10, 1975 | |
| United Kingdom | July 24, 1971 | Ratification: May 19, 1972 | July 10, 1974 | Details |
| United States of America | July 24, 1971 | Ratification: September 18, 1972 | July 10, 1974 | Details |
