If cars or other components of an amusement device may collide in such a way as to cause personal injuries upon failure of normal controls, emergency brakes sufficient to prevent such collisions shall be provided. On amusement devices which make use of inclined tracks, automatic anti-rollback devices shall be installed to prevent backward movement of the passenger-carrying units in case of failure of the propelling mechanism.
N.Y. Comp. Codes R. & Regs. Tit. 12 §§ 45-2.14