| Contracting Parties/Signatories | Signature | Instrument | In Force | Details |
|---|---|---|---|---|
| Angola | October 18, 1983 | January 21, 1999 | ||
| Burundi | October 18, 1983 | December 18, 1984 | ||
| Cameroon | October 18, 1983 | December 18, 1984 | ||
| Central African Republic | October 18, 1983 | December 18, 1984 | ||
| Chad | October 18, 1983 | December 18, 1984 | ||
| Congo | October 18, 1983 | December 18, 1984 | ||
| Democratic Republic of the Congo | October 18, 1983 | December 18, 1984 | ||
| Equatorial Guinea | October 18, 1983 | December 18, 1984 | ||
| Gabon | October 18, 1983 | December 18, 1984 | ||
| Sao Tome and Principe | October 18, 1983 | December 18, 1984 |