AAU TKD (former Association Chairman) has two types of sparring.
Point whose rules are close to open and karate tournaments which are stop after each point and have hands to the head (no groin, pity). Techniques are supposed to be controlled.
Olympic style which is non-stop full-contact with no hands to the head. Scoring is based on knockout or delivering a trembling shock (although I think this has been reworded since lightweights and kids often cannot deliver trembling shock...).
Oh yeah, forms...
I don't do a lot of tournaments anymore, so I won't be there. It's expensive, grueling, and takes time away from my rapidly growing daughter.