N.J. Stat. § 18A:64A-25.7
No purchase, contract or agreement which is single in character or which necessarily or by reason of the quantities required to effectuate the purpose of the purchase, contract or agreement includes the furnishing of additional services or equipment or buying materials or supplies or the doing of additional work, shall be subdivided so as to bring it or any of the parts thereof under the maximum price or cost limitation set forth in section 3 of P.L. 1982, c.189 (C.18A:64A-25.3), thus dispensing with the requirement of public advertising and bidding therefor. Where the doing of any work is included in or incident to the performance or completion of any project which is single in character or inclusive of the furnishing of additional work, materials or supplies or which requires the furnishing of more than one article of materials or supplies, all of the work, materials or supplies requisite for the completion of such project shall be included in one purchase, contract or agreement.
N.J.S. § 18A:64A-25.7