As krzychicano stated, our black belt candidates earn their black belt from the grandmaster himself and no-one else. There is a junior black belt, and when you reach a certain age (16 or 18 I'm not sure) you have to 'catch up' to the adult level black belt and test for that. In my opinion, there shouldn't be an age limit. There is so much to learn to get to that level, and if the instructor deems that you know it well enough then you deserve to wear it. My daughter just turned 9 and she is working towards her red belt. For a small girl, she can get some joint locks very well! Granted, she couldn't take out the 'average man' on the street who was seriously trying to harm her simply because she would be giving up 100 pounds to him but if he was just trying to grab her to get her in his car, look out! I expect that on her current pace, she could have her black belt when she is 11.