I have an inspector who says I cannot have a main breaker in a 200A panel mounted in a building addition fed from a 200A breaker in a 320A meter/main. Feeders are 3/0,3/0,3/0,#2 THHN/THWN copper underground in 2" PVC. The second 200A panel is located back-to-back with the meter/main and has a 200A main as well but he says that is okay. He maintains the panel in the addition must be MLO. I cannot find anything in the 2008 NEC to support his position. Any idea where he is getting this idea?