N.C. Gen. Stat. § 20-279.28

Whenever any proof of financial responsibility filed under the provisions of this Article no longer fulfills the purposes for which required, the Commissioner shall for the purpose of this Article, require other proof as required by this Article, or whenever it appears that proof filed to cover any motor vehicle owned by a person does not cover all motor vehicles registered in the name of such person, the Commissioner shall require proof covering all such motor vehicles. The Commissioner shall suspend the license or the nonresident's operating privilege pending the filing of such other proof.