It's probably illegal and definately a bad idea.
Besides being illegal :Liar:, It won't matter because the boat will sail terribly

and you won't finish high enough for anyone to bother protesting.
I didn't fill my tank once so it would 'float' off the trailer easier. I forgot to fill it after launching.

It was a really dum idea. Forunately the winds were 2 knots. If the wind would have had any velocity at all, I would have been in trouble.
I race my 23.5 for fun. The Hunter wareballast boat are good boats, I like all 3 models, BUT they ain't serious racers. If winning is truely your goal, try another boat.
Good luck in your race. I'll be in Miami racing my 23.5 this weekend.
Mike Howell
H23.5 Belles 3
Ladys Island, SC