The real question is, where are you going to find a B-Cat at the local hero club that is going to know more about the subjects than someone who is coming up for their command???
Funny thing here is that you don't need to be a current A/B Cat to sign someones KDR's off, nor do you need to hold the Exam credit yourself to do so either.
Another class innovation from CAA. Senior Co's will just sign each others KDR's off no probs
S2K