Wow! That was pretty awesome! He made that look so easy! I was surprised to notice after a little while that he was using a running martingale. Not that he shouldn't just that when you see something on the eq type horses it tends to be a standing, though I'm guessing the USEF Talent Search isn't probably just an eq type of thing.
The USEF Talent Search is an equitation class that does not allow standing martingales, since it is geared towards developing a rider for the jumper ring more than the hunter ring. One may use a running martingale or no martingale in that class.