N.J. Stat. § 18A:64A-25.4
Every contract or agreement for the performance of any work or the furnishing or hiring of any materials or supplies, the cost or the contract price of which is to be paid with or out of college funds, not included within the terms of section 3 hereof, shall be made and awarded only by the county college after public advertising for bids and bidding therefor, except as provided otherwise in this article or specifically by any other law. No work, materials or supplies shall be undertaken, acquired or furnished for a sum exceeding in the aggregate $7,500.00 or, commencing January 1, 1985, the amount determined pursuant to subsection b. of section 3 of P.L. 1982, c. 189 (C. 18A:64A-25.3), except by written contract or agreement.
N.J.S. § 18A:64A-25.4