Cal. Fin. Code § 4923

In obtaining the approval of outstanding shares or shareholders required for any amendment to articles or bylaws called for in Section 4922, a converting depository corporation shall provide to its shareholders information as the commissioner may require. In determining the information to be required, the commissioner shall give due consideration to regulations relating to proxy statements issued under Section 14 of the Securities Exchange Act of 1934 (15 U.S.C. Sec. 78n) by (a) the Securities and Exchange Commission, (b) in the case of a depository corporation that is a bank, the federal bank regulatory agencies, and (c) in the case of a depository corporation that is a savings association, the Office of Thrift Supervision.