Cal. Public Utilities Code - PUC § 631. Section 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:
(a)
The processing of an application for certification of the plant.
(b)
The processing of an application for approval of any rate increase reflecting the inclusion of the cost of the plant in the rates of the corporation. This subdivision applies to any plant for which the costs of construction or modification are approved for inclusion in the corporation’s rates on or after January 1, 1983.