California Code, Public Utilities Code - PUC § 454.55

(a)(1) The commission, in consultation with the Energy Commission, shall identify all potentially achievable cost-effective electricity efficiency savings and establish efficiency targets for an electrical corporation to achieve, pursuant to Section 454.5, consistent with the targets established pursuant to subdivision (c) of Section 25310 of the Public Resources Code.

(2) By July 1, 2018, and every four years thereafter, each electrical corporation shall report on its progress toward achieving the targets established pursuant to paragraph (1).

(b)(1) By December 31, 2023, the commission shall, in a new or existing proceeding, undertake a comprehensive review of the feasibility, costs, barriers, and benefits of achieving a cumulative doubling of energy efficiency savings and demand reduction by 2030 pursuant to subdivision (c) of Section 25310 of the Public Resources Code.

(2) Notwithstanding subdivision (c) of Section 25310 of the Public Resources Code, if the commission concludes the targets established for electrical corporations to achieve pursuant to subdivision (a) are not cost effective, feasible, or pose potential adverse impacts to public health and safety, the commission shall revise the targets to the level that optimizes the amount of energy efficiency savings and demand reduction and shall modify, revise, or update its policies as needed to address barriers preventing achievement of those targets.