N.J. Stat. § 12:3-3
It shall not be lawful to fill in with earth, stones or other solid material, in the tidewaters of the Hudson river, New York bay and Kill von Kull, beyond the bulkhead line or lines of solid filling by section 12:3-2 of this title adopted, fixed and established, laid down and exhibited on the aforesaid maps; and it shall not be lawful to erect or maintain any pier or other structure exterior to the said bulkhead line or lines of solid filling in any place or places where no exterior line for piers is reported or indicated by said maps, on the Hudson river, New York bay and Kill von Kull and when an exterior line for piers is recommended and shown by said report and maps, no erection or structure of any kind shall be erected, allowed or maintained beyond or exterior to the aforesaid bulkhead line or lines of solid filling, except piers which shall not exceed one hundred feet in width respectively, and which shall in no case extend beyond the line indicated for piers on said maps accompanying said report; and no piers shall be constructed in said tidewaters, when such exterior pier lines are adopted, fixed and established, at less intervals between such piers than seventy-five feet, except at places occupied and used for ferries, or to be so occupied or used, when the spaces between the piers may be less; nor shall any such pier be constructed in any other manner than on piles or on blocks and bridges; and if on blocks and bridges, such blocks and bridges shall not occupy more than one-half of the length of the pier, and they shall be so constructed as to permit a free flow or passage of water under and through them, without any other interruption or obstruction than the pile or blocks necessary to support said piers.
N.J.S. § 12:3-3