N.J. Stat. § 2A:160-3
The county treasurer of any county may advance to the prosecutor of the county, or to such person as the prosecutor shall designate, from the funds of such county appropriated, set aside and available for court expenses, money necessary to defray the expenses of the prosecutor or such person as he shall designate, to be used for the arrest, extradition and return from foreign jurisdictions of persons charged with violating the criminal laws of this State, and who are fugitives from justice. No such money shall be advanced by the county treasurer, except upon written order of the prosecutor with the approval of the Assignment Judge in such county indorsed thereon, and unless the prosecutor shall file with the county treasurer a statement of the purposes for which the money is to be used and an estimate, in reasonable detail, of the anticipated expenses.
N.J.S. § 2A:160-3