Cal. Public Utilities Code - PUC § 635. Section 635.
In a long-term plan adopted by an electrical corporation or in a procurement plan implemented by a local publicly owned electric utility, the electrical corporation or local publicly owned electric utility shall adopt a strategy applicable both to newly constructed and repowered generation owned and procured by the electrical corporation or local publicly owned electric utility to achieve efficiency in the use of fossil fuels and to address emissions of greenhouse gases.