Corp. Code, § 902

(a) After any shares have been issued, amendments may be adopted if approved by the board and approved by the outstanding shares (Section 152), either before or after the approval by the board.

(b) Notwithstanding subdivision (a), an amendment extending the corporate existence or making the corporate existence perpetual may be adopted by a corporation organized prior to August 14, 1929, with approval by the board alone.

(c) Notwithstanding subdivision (a), unless the corporation has more than one class of shares outstanding, an amendment effecting only a stock split (including an increase in the authorized number of shares in proportion thereto) may be adopted with approval by the board alone.

(d) Notwithstanding subdivision (a), an amendment deleting the initial street address and initial mailing address of the corporation, the names and addresses of the first directors, or the name and address of the initial agent may be adopted with approval by the board alone.

(e) Whenever the articles require for corporate action the vote of a larger proportion or of all of the shares of any class or series, or of a larger proportion or of all of the directors, than is otherwise required by this division, the provision in the articles requiring such greater vote shall not be altered, amended or repealed except by such greater vote unless otherwise provided in the articles.

(f) Notwithstanding subdivision (a), any amendment reducing the vote required for an amendment pursuant to subdivision (c) of Section 158 may not be adopted unless approved by the affirmative vote of at least two-thirds of each class of outstanding shares or such other vote as may then be specified by the articles of the corporation.