| Date |
Description |
| 10/08/09 |
Bulgaria joins the IWC (88) |
| 30/07/09 |
Dominican Republic joins the IWC (87) |
| 17/07/09 |
Republic of Ghana joins the IWC (86) |
| 17/04/09 |
Poland joins the IWC (85) |
| 07/01/09 |
Estonia joins the IWC (84) |
| 25/11/08 |
Lithuania joins the IWC (83) |
| 03/09/08 |
Eritrea joins the IWC (retroactively adhered on 10/10/07) (82) |
