Cal. Rev. & Tax. Code § 40020

The surcharge required to be collected by the elecric utility from the consumer shall be added to the charges to the consumer for the electrical energy sold. The amount of the surcharge may be stated separately. If the electric utility does not separately state the amount of the surcharge, the electric utility shall print on the billing a notice to the effect that the charges include energy resources surcharge computed at (applicable rate) mill per kilowatt hour. Until January 1, 1976, such notice need not appear on the billing itself provided that the electric utility notifies each of its customers, no later than at the time it renders a bill for the first regular billing period applicable to that person which starts on or after the operative date of this part, that electical energy charges shall include energy resources surcharge computed at (applicable rate) mill per kilowatt-hour. If the Board of Equalization fixes a new rate in l975, the electric utility shall notify its customers of the new rate at or prior to the time a billing is rendered to the customer subject to the new rate if the electric utility does not separately state the amount of the surcharge or print on the billing notice that the surcharge is included in the charges.