| Contracting Parties/Signatories | Signature | Instrument | In Force | Details |
| Argentina | | Definitive Signature: December 6, 1994 | December 6, 1994 | |
| Belize | | Definitive Signature: February 18, 1994 | February 18, 1994 | |
| Brazil | | Definitive Signature: October 28, 1994 | October 28, 1994 | |
| Colombia | | Accession: February 3, 2000 | February 3, 2000 | |
| Dominican Republic | | Accession: June 13, 1994 | June 13, 1994 | |
| Honduras | | Definitive Signature: February 18, 1994 | February 18, 1994 | |
| Mexico | | Accession: March 26, 1997 | March 26, 1997 | |
| Nicaragua | | Definitive Signature: February 18, 1994 | February 18, 1994 | |
| Uruguay | | Definitive Signature: February 18, 1994 | February 18, 1994 | |
| Venezuela (Bolivarian Republic of) | | Accession: December 16, 1997 | December 16, 1997 | |