N.J. Stat. § 6:2-6: Flight over lands permitted; liability for forced landing

Flight in aircraft over the lands and waters of this state is lawful, unless at such a low altitude as to interfere with the then existing use to which the land or water, or the space over the land or water, is put by the owner, or unless so conducted as to be imminently dangerous to persons or property lawfully on the land or the water beneath. The landing of an aircraft on the lands or waters of another, without his consent, is unlawful, except in the case of a forced landing. For the damages caused by a forced landing, however, the owner or lessee of the aircraft or the airman shall be liable as provided in section 6:2-7 of this title.