I noticed in the tournament rules that sleeves are required, which is great. However it doesn't say anything against someone using different matte sleeves for different factions within one deck. For example, it seems like according to the rules I could sleeve my Sith command and objective cards as red and my Imperial cards as black. That way when I draw or shuffle them I could know what faction is coming next.
It does say sleeves are used to prevent accusations or marking cards, but nowhere does it say that card marking is illegal. It seems someone could use matte sleeves and just write on the back of them things like "darth vader" to denote which card it is.
I suspect this is a huge mistake in the rules, unless I am missing something somewhere.