N.C. Gen. Stat. § 87-89

No well or pump installation in existence and in use on July 6, 1967, shall be required to conform to provisions of subsection (a) of G.S. 87-88, or any rules or regulations adopted pursuant thereto not inconsistent with the provisions of this Article; provided, however, that any well now or hereafter abandoned, including any well deemed to have been abandoned, as defined in the Article, shall, within such time as may be specified by the Environmental Management Commission, be brought into compliance with the requirements of this Article and any applicable rules or regulations with respect to abandonment of wells. It is the intention of the General Assembly that if the provisions of this section are held invalid as a grant of an exclusive or separate emolument or privilege, within the meaning of Article I, Sec. 7 of the North Carolina Constitution, the remainder of this Article shall be given effect without the invalid provision or provisions.