Cal. Pub. Util. Code § 399.13
(a)
(2)
(3) The commission shall direct each retail seller to prepare and submit an annual compliance report that includes all of the following:
(5) The commission shall adopt, by rulemaking, all of the following:
(A) A process that provides criteria for the rank ordering and selection of least-cost and best-fit eligible renewable energy resources to comply with the California Renewables Portfolio Standard Program obligations on a total cost and best-fit basis. This process shall take into account all of the following:
(v)
(B) Rules permitting retail sellers to accumulate, beginning January 1, 2011, excess procurement in one compliance period to be applied to any subsequent compliance period. The rules shall apply equally to all retail sellers. In determining the quantity of excess procurement for the applicable compliance period, the commission shall retain the rules adopted by the commission and in effect as of January 1, 2015, for the compliance period specified in subparagraphs (A) to (C), inclusive, of paragraph (1) of subdivision (b) of Section 399.15. For any subsequent compliance period, the rules shall allow the following:
(6) Consistent with the goal of increasing California’s reliance on eligible renewable energy resources, the renewable energy procurement plan shall include all of the following:
(8)
(b)
(f)