N.J. Stat. § 40:37-11.1
Any county park commission may enter into negotiations and may contract with the United States or with any board, body, commission, department or agency thereof for the occupation and use by the United States or by any board, body, commission, department or agency thereof of any real property under the jurisdiction of said county park commission. Such contract shall contain provisions by which the United States agrees (a) that prior to the termination of said use and occupancy of the real property, the United States without expense to the county park commission, shall restore the real property to the condition it was in at the time of the entry of the United States or the board, body, commission, department or agency thereof upon the same, and that upon the termination of said use and occupancy the United States shall turn back said real property to the county park commission in such restored condition; or in lieu of restoring the real property to the condition it was in at the time of said entry the United States upon the termination of said use and occupancy shall pay to the county park commission the sum of money required in the opinion of the duly authorized representatives of both parties to restore said real property to the condition it was in at the time of said entry, and (b) that during said use and occupancy of the real property the United States shall protect all waters therein from pollution and shall maintain in service and protect from damage all cables, conduits, drains, water pipes, and sewers, both sanitary and storm, located on or in said real property. Such contract may contain such additional terms and conditions as shall be approved by the said county park commission.
N.J.S. § 40:37-11.1