N.J. Stat. § 40:49-9
Any ordinance authorizing any improvement shall become operative ten days after the publication thereof after its final passage, unless within said ten days a protest against making the improvement shall be filed in the office of the municipal clerk signed by taxpayers representing ten per cent in amount of the assessed valuation of such municipality, whose names appear on the last preceding assessment roll thereof, in which case the ordinance shall remain inoperative until a proposition for the ratification thereof shall be adopted, at an election to be held for that purpose, by a majority of the qualified voters of the municipality voting on the proposition. The certificate of the municipal clerk filed in his office as to the filing or sufficiency of any protest shall be conclusive for the purposes of this section.
At least ten days before the election notice thereof shall be published once in a newspaper published in the municipality, or if there be no such newspaper, then in a newspaper published in the county and circulating in the municipality.
N.J.S. § 40:49-9