N.J. Stat. § 32:15-3
If on or before December thirty-first, one thousand nine hundred and twenty-seven, the owner or owners of said parcel of land conveyed by a proper grant or deed of gift to said board of commissioners such part of said parcel of land as may be required for the construction and maintenance as a public highway of a southerly extension of the Henry Hudson drive, by metes and bounds mutually agreed upon by the owner or owners thereof and said board of commissioners, thereafter no commission or authority of the State, no municipality, and no corporation or individual acting under the authority of the State, shall take by eminent domain any of the remainder of said tract or parcel of land described in section 32:15-2 of this Title without express subsequent authority given by the Legislature of the State.
N.J.S. § 32:15-3