N.J. Stat. Ann. § 18A:18A-29

The department shall classify all such prospective bidders as to the character and amount of public work contracts on which they shall be qualified to submit bids. The department shall consider reports filed by boards of education pursuant to 18A:18A-15 as a basis for denial of a favorable classification to all prospective bidders. The classification shall be made and an immediate notice thereof shall be sent to the prospective bidder or bidders by registered mail within a period of 15 days after the date of receipt of the statement in response to the questionnaire; provided, however, that if the department shall require additional information from the prospective bidder, the classification shall be made and the notice sent within 15 days after receipt of such additional information.