I understand that Master Stoker. By "don" I meant wear, not dan as in rank. My comment was addressing wayofhandandfoot's comment that in Korea people are not allowed to don / wear a black belt until they are 18 and I was just commenting that I have seen dozens if not hundreds of BBs from Korea that were under 18.
My mistake and I have seen them in korea wear them as well under the age of 18 so I do not understand that statement. Sorry about the mix up