How is a Level 45 Allowed to Compete in Bronze League?

@AlphonseDisciple Just connected the dots when I read your answer about the C word. Silly me. Soooo this is very interesting that he had this unit unlocked and he is only Level 46. I wonder how he did this. He has the Flame Tank unlocked as well but interestingly enough not the stealth tank or inferno nor the mammoth or other high level GDI units.