Cal. Pub. Util. Code § 399.16
(b) Consistent with the goals of procuring the least-cost and best-fit electricity products from eligible renewable energy resources that meet project viability principles adopted by the commission pursuant to paragraph (5) of subdivision (a) of Section 399.13 and that provide the benefits set forth in Section 399.11, a balanced portfolio of eligible renewable energy resources shall be procured consisting of the following portfolio content categories:
(1) Eligible renewable energy resource electricity products that meet either of the following criteria:
(c) In order to achieve a balanced portfolio, all retail sellers shall meet the following requirements for all procurement credited toward each compliance period:
(d) Any contract or ownership agreement originally executed prior to June 1, 2010, shall count in full toward the procurement requirements established pursuant to this article, if all of the following conditions are met: