I'll start on the vehicles and probably the Sisters Repentia next.
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Another method is the way GW-Canada did it for the last few years of their GT/Conflict system. After round 1 have the players exchange army lists (and codexes). If your list is found to be incorrect you forfeit that game. Your opponent then signs off on the list if it OK. In the event that signature was put on an invalid list you BOTH loose your battle points... all of them! Of course GW really never enforced this (when do they ever?) as at the last Vancouver event I played a Tau player who was allowed to continue with his army even though he had no battlesuit as Commander... I was told this AFTER we had set up!