Cal. Public Utilities Code § 399.14

(a) (1) An electrical corporation, pursuant to Chapter 5 (commencing with Section 1001), and in order to meet its unmet renewables portfolio standard procurement requirements, may apply to the commission for approval to construct, own, and operate an eligible renewable energy resource. (2) If the proposed eligible renewable energy resource complies with the requirements of subdivision (b), the commission shall approve an application filed pursuant to paragraph (1), until the commission has approved applications for eligible renewable energy resources for the electrical corporation that, when constructed and operating, will provide 8.25 percent of the electrical corporation’s anticipated retail sales by December 31, 2020, and thereafter. (3) The commission may approve additional applications for eligible renewable energy resources once the commission has approved sufficient applications for eligible renewable energy resources for the electrical corporation that, when constructed and operating, will provide 8.25 percent of the electrical corporation’s anticipated retail sales by December 31, 2020, and thereafter. (b) The commission shall not approve any application by an electrical corporation pursuant to subdivision (a) unless both of the following conditions are met: (1) The eligible renewable energy resource utilizes a viable technology at a reasonable cost. (2) The eligible renewable energy resource provides comparable or superior value to ratepayers when compared to then recent contracts for generation provided by eligible renewable energy resources. (c) In approving any application by an electrical corporation for approval to construct, own, and operate an eligible renewable energy resource, the commission shall apply traditional cost-of-service ratemaking. When applying traditional cost-of-service ratemaking, the commission, in the certificate authorizing the new construction, shall specify the maximum cost determined to be reasonable and prudent for the construction of the facility and the cost of initial operation of the facility. Upon a filing by the electrical corporation, the commission may authorize an increase in the maximum cost of construction if it determines that the cost has in fact increased, that the cost increase is determined to be reasonable and prudent, and that the present or future public convenience or necessity require construction of the project at the increased cost.