Cal. Corp. Code § 3201

If any disappearing corporation in a merger is a flexible purpose corporation and the surviving entity is not a flexible purpose corporation, or is a flexible purpose corporation the articles of incorporation of which set forth materially different purposes, the merger shall be approved by an affirmative vote of at least two-thirds of the outstanding shares of each class, or a greater vote if required in the articles, regardless of whether that class is entitled to vote thereon by the provisions of the articles, of the disappearing flexible purpose corporation.