Cal. PUC § 1416

The finding of the commission fixing the just compensation to be paid by the political subdivision for the lands, property, and rights shall be final and shall not be subject to modification, alteration, reversal, or review by any court of this State. If the court in which the political subdivision has commenced its action, subsequent to the making and filing by the commission of its finding as to just compensation, decides that the political subdivision has the right and power under the law to take the lands, property, and rights, it shall enter a judgment in favor of the complainant in the action, fixing as the just compensation which shall be paid for the taking of the lands, property, and rights, the just compensation fixed by the commission. The judgment may include the allowance of such costs between the parties as is provided for in the law of eminent domain of this State. The judgment of the court insofar as it refers to the just compensation to be paid for the lands, property, and rights, shall be final and shall not be subject to modification, alteration, reversal, or review by any court except as specified in this chapter. The judgment of the court shall include a provision, in substance, that it is subject to modification by reason of such increase or decrease in the just compensation to be paid as may thereafter be certified to the court by the commission, as provided in this chapter.