| Country | Region | Contracting Party | |
|---|---|---|---|
| 21 | Bolivia (Plurinational State of) | Latin America and the Caribbean | Yes |
| 22 | Bosnia and Herzegovina | Europe | No |
| 23 | Botswana | Africa | No |
| 24 | Brazil | Latin America and the Caribbean | Yes |
| 25 | Brunei Darussalam | Asia | No |
| 26 | Bulgaria | Europe | Yes |
| 27 | Burkina Faso | Africa | Yes |
| 28 | Burundi | Africa | Yes |
| 29 | Cabo Verde | Africa | Only Signature |
| 30 | Cambodia | Asia | Yes |
| 31 | Cameroon | Africa | Yes |
| 32 | Canada | North America | Yes |
| 33 | Central African Republic | Africa | Yes |
| 34 | Chad | Africa | Yes |
| 35 | Chile | Latin America and the Caribbean | Yes |
| 36 | China | Asia | No |
| 37 | Colombia | Latin America and the Caribbean | Only Signature |
| 38 | Comoros | Africa | No |
| 39 | Congo | Africa | Yes |
| 40 | Cook Islands | South West Pacific | Yes |