Notwithstanding any other provision of law:
(a) The decision of the commission on an application for an additional facility at a potential multiple facility site shall be issued within three months after the acceptance of the application or at such later time as is mutually agreed upon by the commission and the applicant.
(b) In reviewing an application for an additional facility at a potential multiple facility site, the commission may, upon a showing of good cause, undertake a reconsideration of its prior determinations in the final report for the site pursuant to Section 25514 or its decision pursuant to Section 25523 based on current conditions and other reasonable alternatives to the proposed facility. Such reconsideration must be completed within seven months after acceptance of such application for an additional facility.
(c) The commission shall, pursuant to Section 21100.2, provide by resolution or order for completing and certifying the environmental impact report within the time limits established by subdivisions (a) and (b).