California Code, Public Utilities Code - PUC § 631

In addition to the requirements of Article 1 (commencing with Section 1001) of Chapter 5 and any other provisions of law, the commission shall require every electrical corporation and every gas corporation proposing to construct or modify any electric plant or gas plant at a cost in excess of one hundred million dollars ($100,000,000) to reimburse the commission for expenses of such consultants or advisory services as the commission deems necessary for either or both of the following: