N.C. Gen. Stat. § 58-5-110
The Commissioner is hereby empowered, upon the written consent of any insurance company depositing with the Commissioner or the State Treasurer under any law of this State, any state, county, city, or town bonds or notes which are payable to bearer, to cause such bonds or notes to be registered as to the principal thereof in lawful books of registry kept by or in behalf of the issuing state, county, city or town, such registration to be in the name of the Treasurer of North Carolina or the Commissioner in trust for the company depositing the notes or bonds and the State of North Carolina, as their respective interest may appear, and is further empowered to require of any and all such companies the filing of written consent to such registration as a condition precedent to the right of making any such deposit or right to continue any such deposit heretofore made.
N.C. Gen. Stat. § 58-5-110