All of the official material published by Wizards of the Coast is allowed except:
- The current month’s Dungeon Magazine
- The current month’s Dragon Magazine
- The Chosen of Bahamut/Tiamat Epic Path is restricted; All requirements for the class are waived when the character becomes a Legend.
The final arbiter will be Wizards of the Coast’s Character Builder- as long as your character is legal there, then it is legal for the Taarthas Campaign.