I've seen lots of conflicting opinions on the legality of 30k army lists in regular 40k games.
What I'm looking for is an actual ruling in any of the books or errata that either allows or disallows.
Is there written restrictions for bringing a full Legion Astartes list to a 40k tournament or league (other than the TO rulings)?
If so what book and page?
I don't play 30k armies, I just want to know the actual page ref in case it comes up or to assist a TO in making a ruling.