N.C. Gen. Stat. § 58-10-5
If a domestic stock life insurance corporation shall determine to become a mutual life insurance corporation it may, in carrying out any plan to that end under the provisions of G.S. 58-10-1, acquire any shares of its own stock by gift, devise, or purchase. And until all such shares are acquired, any shares so acquired shall be acquired in trust for the policyholders of the corporation as hereinafter provided, and shall be assigned and transferred on the books of the corporation to not less than three nor more than five trustees, and be held by them in trust and be voted by such trustees at all corporate meetings at which stockholders have the right to vote until all of the capital stock of such corporation is acquired, when the entire capital stock shall be retired and canceled; and thereupon, unless sooner incorporated as such, the corporation shall be and become a mutual life insurance corporation without capital stock. Said trustees shall be appointed and vacancies shall be filled as provided in the plan adopted under G.S. 58-10-1. Said trustees shall file with the corporation and with the Commissioner a verified acceptance of their appointments and declaration that they will faithfully discharge their duties as such trustees. After the payment of such dividends to stockholders or former stockholders as may have been provided in the plan adopted under G.S. 58-10-1, all dividends and other sums received by said trustees on said shares of stock so acquired, after paying the necessary expenses of executing said trust, shall be immediately repaid to said corporation for the benefit of all who are or may become policyholders of said corporation and entitled to participate in the profits thereof, and shall be added to and become a part of the surplus earned by said corporation, and be apportionable accordingly as a part of said surplus among said policyholders.
N.C. Gen. Stat. § 58-10-5