CDP Clearing Rules Rule 8 — Default Rules Past version: Effective up to 05 Sep 2021 8.6F CDP's Obligations under New Purchase Contracts or New Sale Contracts 10 Dec 2018 to 05 Sep 202106 Sep 2021 onwards Added on 10 December 201810 December 2018. 8.6F.1 [Rule has been deleted.] Deleted on 6 September 2021. 8.6F.2 [Rule has been deleted.] Deleted on 6 September 2021.