This really is the final word on what is going to be allowed at Warhammer World Events, and yes it includes all dataslates, all codex supplements, and both expansions Stronghold Assault and Escalation. A good call in my opinion, and with publications and events all speaking with the same voice, its much easier to see what is intended for the game, and its events.
Of course we are just shy of Forgeworld models, but I believe that these will come in the near future. Hopefully we can now move past these divisions and get down to gaming. I am going up against a super heavy this weekend without fielding one in return. So we will see how that works out.
Here is a links to the latest Warrior Code
http://www.games-workshop.com/gws/content/article.jsp?categoryId=3500001&aId=2200016a
http://www.games-workshop.com/MEDIA_CustomProductCatalog/m3640318a_Warriors_code_V1.3.pdf