California Code, Corporations Code - CORP § 9926

Any subject corporation that existed on the first day of January, 1873, and was formed under the laws of this state, which corporation has not already elected to continue its existence under the prior nonprofit law, may at any time elect to continue its existence under the provisions of this code applicable thereto by the unanimous vote of all its directors, or such election may be made at any annual meeting of the members, or at any meeting called by the directors especially for considering the subject, if voted by members representing a majority of the voting power, or may be made by the directors upon the written consent of that number of the members.

A certificate of the action of the directors, signed by them and their secretary, when the election is made by their unanimous votes or upon the written consent of the members, or a certificate of the proceedings of the meeting of the members when the election is made at any such meeting, signed by the chairperson and secretary of the meeting and a majority of the directors, shall be filed in the office of the Secretary of State, and thereafter the corporation continues its existence under the provisions of this code which are applicable thereto, and possesses all the rights, and powers, and is subject to all the obligations, restrictions, and limitations prescribed thereby.