| Contracting Parties/Signatories | Signature | Instrument | In Force | Details |
|---|---|---|---|---|
| Bolivia (Plurinational State of) | March 10, 1996 | Ratification : July 17, 1996 | ||
| Colombia | March 10, 1996 | |||
| Ecuador | March 10, 1996 | Ratification : September 13, 1996 | ||
| Peru | March 10, 1996 | Ratification : May 17, 1996 |