N.J. Stat. § 32:1-88
The state of New Jersey (the state of New York by appropriate legislation concurring herein) does pledge to and agree with those subscribing to the obligations issued by the port authority for the construction of said bridge and incidental purposes that the state will not authorize the construction or maintenance of any other highway crossings for vehicular traffic of the waters of the Hudson river, between the two states in competition with the said bridge, nor will it limit or alter the rights now vested in the port authority to establish and levy such charges and tolls as it may deem convenient or necessary to produce sufficient revenue to meet the expense of maintenance and operation and to fulfill the terms of the obligations assumed by it in relation to such bridge until the said obligations, together with interest thereon, are fully met and discharged; provided, that such crossings shall be considered as competitive with the bridge across the Hudson river only if they shall form a highway connection for vehicular traffic between the two states across or under the Hudson river, south of the northerly boundary line of the state of New Jersey and a point opposite thereto on the New York side; except that a crossing may be authorized by the state in conjunction with the state of New York at a point in New Jersey opposite a point in the borough of Manhattan, state of New York, south of Sixtieth street on the New York side; and provided, further, that nothing herein contained shall preclude the authorization of such additional interstate crossings if and when adequate provision shall be made by law for the protection of those advancing money upon the obligations of the port authority for the construction of the bridge mentioned in paragraph one hereof or incidental purposes.
N.J.S. § 32:1-88