Chapters 10 (commencing with Section 1000), 11 (commencing with Section 1100), 12 (commencing with Section 1200) and 13 (commencing with Section 1300) of the new law apply to transactions consummated after the effective date, unless a required approval of the outstanding shares (Section 152) has been given prior to the effective date or has been given after the effective date but at a meeting of shareholders initially called for a date prior to the effective date, in which case the transaction shall be governed by the prior law.