When a result is official, that word shall be flashed on the result commission and shall signify that the placing of the horse is final insofar as the payoff is concerned. If any change be made in the order of finish of a race after the result is so declared official, it shall not affect the payoff. The posting on the result commission of the order of winning, place and show horses or the prices to be paid shall not be deemed to signify that such result and prices are official until the official signal has been shown on the result commission or announced by the public address system.
N.Y. Comp. Codes R. & Regs. Tit. 9 § 4008.1