N.C. Gen. Stat. § 58-52-15
The forms of the policies, applications, certificates or other evidence of insurance coverage and the rate manual showing rates, rules and classification of risks applicable thereto shall be subject to the applicable provisions of G.S. 58-51-1. The Commissioner may disapprove the premium rates for such insurance, or any class thereof, if he finds that such rates are by reasonable assumptions excessive in relation to the benefits provided. In determining whether such rates by reasonable assumptions are excessive in relation to the benefits provided, the Commissioner shall give due consideration to past and prospective claim experience on such insurance, or other comparable insurance, within and outside this State, and to fluctuations in such claim experience, to a reasonable risk charge, to contribution to surplus and contingency funds, to past and prospective expenses, both within and outside this State, and to all other relevant factors within and outside this State, including any differing operating methods of the insurers joining in the issue of such insurance. In the event of any such disapproval, the decision of the Commissioner shall be subject to review under G.S. 58-2-75. In exercising the powers conferred by this section, the Commissioner shall not be bound by any other requirements of Articles 1 through 64 of this Chapter with respect to standard provisions required to be included in the forms of the policies, applications, certificates or other evidence of insurance coverage filed with the Commissioner.
N.C. Gen. Stat. § 58-52-15