N.J. Stat. § 18A:20-4.4
Every contract in excess of $2,000.00 for any public work contracted for by a private party acting under an express agreement for subsequent lease by a board of education shall contain a provision stating the prevailing wage rate which can be paid (as determined pursuant to the applicable provisions of the "New Jersey Prevailing Wage Act" (P.L. 1963, c. 150)) to the workmen employed in the performance of the contract, and the contract shall contain a stipulation that such workmen shall be paid not less than such prevailing wage rate. No board of education shall enter into any such agreement or understanding except upon the condition that such provision and stipulation shall be included in the contract; and no such agreement or understanding shall be valid or shall be honored by any board of education if such provision and stipulation are not included in the contract.
N.J.S. § 18A:20-4.4