About NAGA no-gi division ??

What determines what bracket in no-gi you can compete in?

I know it goes by weight and time training...but time training what?

Time training no-gi grappling or just grappling in general?

Could a guy who has been doing judo for 5 years but never without a gi do the beginner? What about the same thing but he's a bjj'er or a sambo player?

What about a wrestler who has been wrestling for years but very little submission wrestling?

TTT for judo blackbelts and wrestling national champions in the beginner division