I found this in NYS DMV - Frequently Asked Questions

Motor-assisted Bicycle - a bicycle to which a small motor is attached. A motor-assisted bicycle does not qualify for a registration as a motorcycle, moped or ATV and does not have the same equipment.

These devices are not allowed on any street, highway, parking lot, sidewalk or other area that allows public motor vehicle traffic. You are subject to arrest if you operate one of these motorized vehicles and do not have a registration, driver license, inspection, insurance or correct equipment. The DMV can not provide any information about operation of these devices on private property. Contact the local authorities and property owners.

Nice huh? we, the little guy, tries to find a way to get by and the Government closes us down. . . Typical