The officials shall classify all such prospective bidders as to the character and amount of work on which they shall be qualified to submit bids. The classification shall be made and an immediate notice thereof shall be sent to the prospective bidder by first-class 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 official 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.
N.J.S. § 27:7-35.4