N.Y. Comp. Codes R. & Regs. tit. 21, § 1262.79
(3) Exhaust systems.
(iv) The coupling device shall be positive locking and released through manual action only for any combination of vehicles.
(b) Automotive vehicles.
(1) Brakes. Every automotive vehicle shall have brakes which are capable of bringing the vehicle or combination of vehicles to a full stop when operated at 20 mph on dry pavement on level ground within the following distances from the point where such brakes are first applied:
(iii) Hand or parking brake—75 feet
A hand or parking brake shall be required on all automotive vehicles and shall be adequate to hold the vehicle or combination of vehicles stationary on any grade upon which operated.
(5) Signal lights.
(a) General.