N.Y. Comp. Codes R. & Regs. tit. 9, § 4035.9
(a) All riding crops are subject to inspection and approval by the stewards and the clerk of scales.
(1) Riding crops shall have a shaft and a flap and will be allowed in flat racing including training only as follows:
(2) The flap is the only allowable attachment to the shaft and must meet these specifications:
(c) Although the use of a whip is not required, any jockey who uses a whip during a race is prohibited from whipping a horse:
(d) Correct uses of the whip are: