Every motor vehicle which is used to vend frozen desserts to pedestrians on public highways or sidewalks shall be equipped with a front crossing arm which meets the standards described in section 69.5 of this Part. The front crossing arm shall be extended whenever the vehicle is stopped on a public highway to vend frozen desserts. The front crossing arm shall be retracted whenever the vehicle is in motion or is not being used to vend frozen desserts.
N.Y. Comp. Codes R. & Regs. Tit. 15 § 69.4