N.C. Gen. Stat. § 113-256: Powers herein granted to Commission are supplemental.

Any powers herein granted to the Commission shall be regarded as in aid of and supplemental to and in no case a limitation upon any of the powers vested in said Commission by other laws of the State of North Carolina or by the laws of the states of Maine, New Hampshire, Massachusetts, Connecticut, Rhode Island, New York, New Jersey, Delaware, Maryland, Virginia, South Carolina, Georgia and Florida or by the Congress or the terms of said Compact. (1949, c. 1086, s. 5; 1965, c. 957, s. 18.)