If by "new rules" you mean the new rules in the 7th edition book, yes. If you mean "new rules" like the specific rules governing the GW terrain kits, the answer is no.
Lots of our terrain is made up from GW kits, we plan to treat them as if they were not.
Just because that Imperial Bastion is, in fact, an Imperial Bastion GW kit, it doesn't mean we will be using the new rules that govern it, etc. etc.
This may change for future events.