N.J. Stat. Ann. § 32:11D-13

The commission shall have, exercise and discharge its functions, powers and duties within the limits of the basin, except that it may in its discretion act outside the basin whenever such action may be necessary or convenient to effectuate its powers or duties within the basin, or to sell or dispose of water, hydroelectric power or other water resources within or without the basin. The commission shall exercise such power outside the basin only upon the consent of the State in which it proposes to act.