N.Y. Parks, Recreation and Historic Preservation Law § 25.18

§ 25.18 Trail grooming equipment; requirements. Any combination of\nequipment used to maintain the snow surface of snowmobile trails shall\nbe equipped with:\n 1. a head light and tail light as required of snowmobiles in this\narticle, as well as a revolving, rotating, flashing, oscillating or\nconstantly moving amber lamp with a minimum candlepower of sufficient\nintensity to be plainly visible from a distance of five hundred feet\nfrom the front and rear during hours of darkness under normal\natmospheric conditions; and\n 2. reflector material as required for snowmobiles.\n