N.J. Stat. Ann. § 32:13A-17

No bridge or tunnel for the use of the traveling public shall hereafter be constructed or operated by any county, municipal corporation, or political subdivision of the state of New Jersey, and no franchise shall hereafter be granted for the operation of a ferry, within ten miles of the tunnel constructed under the authority of this chapter, measured along the boundary line between the state of New Jersey and the commonwealth of Pennsylvania, so long as any bond or bonds, or the interest thereon be outstanding and unpaid; provided, however, that nothing in this chapter shall be construed to prevent the construction of any bridge or tunnel by treaties between the state of New Jersey and the commonwealth of Pennsylvania with the approval of the congress of the United States of America at any point connecting the state of New Jersey and the commonwealth of Pennsylvania over or under the Delaware river.