| Contracting Parties/Signatories | Signature | Instrument | In Force | Details |
|---|---|---|---|---|
| Benin | Accession : August 3, 2017 | |||
| Cameroon | December 13, 1979 | |||
| Czech Republic | Declaration/Notification of Succession : September 30, 1993 | Details | ||
| Holy See | December 13, 1979 | |||
| Israel | December 13, 1979 | |||
| Liberia | Accession : September 16, 2005 | |||
| Slovakia | Declaration/Notification of Succession : May 28, 1993 | Details |