Cal. Corporations Code § 9915

(a) Subdivision (a) of Section 5151 of the new public benefit corporation law does not apply to subject corporations governed by the public benefit corporation law, subdivision (a) of Section 7151 of the new mutual benefit corporation law does not apply to subject corporations governed by the mutual benefit corporation law, and subdivision (a) of Section 9151 of the new religious corporation law does not apply to subject corporations governed by the religious corporation law, but those corporations shall continue to be governed by the prior nonprofit law unless and until an amendment of the articles is filed pursuant to Section 9913. If an amendment makes any change in the number of directors or the maximum or minimum number of directors or makes change from a fixed to a variable board or vice versa, it shall also be approved by the members (Section 5034). (b) Notwithstanding subdivision (a), the new public benefit corporation law, the new mutual benefit corporation law, or the new religious corporation law, as appropriate, rather than the provisions of the prior nonprofit law apply with the respect to determining the limits on the number of directors.