N.C. Gen. Stat. § 62-165

Whenever any securities set forth and described in any such application for authority or certificate of notification as pledged or held unencumbered in the treasury of the utility shall, subsequent to the filing of such application or certificate, be sold, pledged, repledged, or otherwise disposed of, by the utility, such utility shall, within 10 days after such sale, pledge, repledge, or other disposition, file with the Commission a certificate of notification to that effect, setting forth therein all such facts as may be required by the Commission.