I believe from the people I took to get ID cards it is supposed to be OC2/E-5, OC1/E-6 but RUFIO would probably remember better than I would, of course it is up to the person making the ID cards to get it right.Come to think of it, that may have been how she found out. His ID card said E7/CPO if I remember correctly. He was definitely apologetic about it. Like "Hey, I'm sorry I didn't ask for it." And we had two Chiefs in our class that didn't think it was very funny either.