N.Y.C. Admin. Code § 10-308: § 10-308 Vehicles, rooms, dwellings or structures; possession therein.

The presence of a rifle, or shotgun, or rifle or shotgun ammunition, in a vehicle, room, dwelling or structure, without a rifle and shotgun permit therefor and a certificate of registration therefor, or the presence of an assault weapon in a vehicle, room, dwelling or structure, shall be presumptive evidence of possession thereof by all persons occupying the vehicle, room, dwelling or structure at the time.