| Contracting Parties/Signatories | Signature | Instrument | In Force | Details |
|---|
| Algeria | April 13, 1988 | Ratification: August 14, 1990 | September 13, 1990 | |
| Angola | April 13, 1988 | | | |
| Argentina | April 13, 1988 | Ratification: January 31, 1990 | March 2, 1990 | |
| Bangladesh | April 13, 1988 | Ratification: August 17, 1988 | April 19, 1989 | |
| Benin | April 13, 1988 | | | |
| Bolivia (Plurinational State of) | April 13, 1988 | Ratification: June 17, 1989 | June 17, 1989 | |
| Brazil | April 13, 1988 | Ratification: April 25, 1991 | May 25, 1991 | |
| Cameroon | April 13, 1988 | Ratification: April 16, 1992 | May 16, 1992 | |
| Chile | April 13, 1988 | Ratification: September 28, 1989 | October 28, 1989 | |
| Colombia | April 13, 1988 | | | |
| Cuba | April 13, 1988 | Ratification: February 22, 1989 | April 19, 1989 | |
| Democratic People's Republic of Korea | | Definitive Signature: April 13, 1988 | | |
| Ecuador | April 13, 1988 | Ratification: April 17, 1990 | May 17, 1990 | |
| Egypt | April 13, 1988 | Ratification: June 16, 1989 | June 16, 1989 | |
| Ghana | April 13, 1988 | Ratification: December 6, 1988 | April 19, 1989 | |
| Guinea | April 13, 1988 | Ratification: December 20, 1989 | January 19, 1990 | |
| Guyana | April 13, 1988 | Ratification: April 4, 1989 | May 4, 1989 | |
| India | April 13, 1988 | Ratification: March 20, 1988 | April 19, 1989 | |
| Indonesia | April 13, 1988 | Ratification: September 22, 1989 | October 22, 1989 | |
| Iran (Islamic Republic of) | April 13, 1988 | | | |
| Iraq | April 13, 1988 | Ratification: November 30, 1988 | April 19, 1989 | |
| Libya | April 13, 1988 | Ratification: June 8, 1989 | July 8, 1989 | |
| Malaysia | April 13, 1988 | Ratification: August 1, 1989 | August 31, 1989 | |
| Mexico | April 13, 1988 | Ratification: April 13, 1989 | May 13, 1989 | |
| Morocco | April 13, 1988 | Ratification: June 13, 1989 | July 13, 1989 | |
| Mozambique | April 13, 1988 | | | |
| Myanmar | April 13, 1988 | | | |
| Nicaragua | April 13, 1988 | Ratification: April 3, 1989 | May 3, 1989 | |
| Nigeria | April 13, 1988 | Ratification: March 17, 1989 | April 19, 1989 | |
| Pakistan | April 13, 1988 | Ratification: June 2, 1989 | July 2, 1989 | |
| Peru | April 13, 1988 | Ratification: August 17, 1988 | April 19, 1989 | |
| Philippines | April 13, 1988 | Ratification: February 24, 1992 | March 30, 1992 | |
| Republic of Korea | April 13, 1988 | Ratification: May 12, 1989 | June 11, 1989 | |
| Romania | April 13, 1988 | Ratification: January 20, 1989 | April 19, 1989 | |
| Singapore | April 13, 1988 | Ratification: January 17, 1989 | April 19, 1989 | |
| Sri Lanka | | Definitive Signature: April 13, 1988 | April 19, 1989 | |
| Sudan | April 13, 1988 | Ratification: March 28, 1991 | April 27, 1991 | |
| Thailand | April 13, 1988 | Ratification: February 5, 1990 | March 7, 1990 | |
| Trinidad and Tobago | April 13, 1988 | | | |
| Tunisia | April 13, 1988 | Ratification: June 26, 1989 | August 25, 1989 | |
| United Republic of Tanzania | April 13, 1988 | Ratification: January 19, 1989 | April 19, 1989 | |
| Uruguay | April 13, 1988 | | | |
| Venezuela (Bolivarian Republic of) | April 13, 1988 | | | |
| Viet Nam | April 13, 1988 | Ratification: August 22, 1988 | April 19, 1989 | |
| Zimbabwe | April 13, 1988 | Ratification: August 19, 1988 | April 19, 1989 | |
| the former Yugoslav Republic of Macedonia | April 13, 1988 | Ratification: January 10, 1989 | April 19, 1989 | |
