N.J. Stat. § 2A:30A-1
As used in this act:
"Billing" means, in accordance with the terms and definitions of the applicable contract, any periodic payment, final payment, written approved change order or request for release of retainage.
"Prime contractor" means a person who contracts with an owner to improve real property.
"Improve" means: to build, alter, repair or demolish any structure upon, connected with, on or beneath the surface of any real property; to excavate, clear, grade, fill or landscape any real property; to construct driveways and private roadways on real property; to furnish construction related materials, including trees and shrubbery, for any of the above purposes; or to perform any labor upon a structure, including any design, professional or skilled services furnished by an architect, engineer, land surveyor or landscape architect licensed or registered pursuant to the laws of this State.
"Structure" means all or any part of a building and other improvements to real property.
"Owner" means any person, including any public or governmental entity, who has an interest in the real property to be improved and who has contracted with a prime contractor for such improvement to be made. "Owner" shall be deemed to include any successor in interest or agent acting on behalf of an owner.
"Prime rate" means the base rate on corporate loans at large United States money center commercial banks.
"Real property" means the real estate that is improved upon or to be improved upon.
"Subcontractor" means any person who has contracted to furnish labor, materials or other services to a prime contractor in connection with a contract to improve real property.
"Subsubcontractor" means any person who has contracted to furnish labor, materials or other services to a subcontractor in connection with a contract to improve real property.
N.J.S. § 2A:30A-1