California Code, Public Utilities Code - PUC § 431

(a) The commission shall annually determine a fee to be paid by every electrical, gas, telephone, telegraph, water, sewer system, and heat corporation and every other public utility providing service directly to customers or subscribers and subject to the jurisdiction of the commission other than a railroad, except as otherwise provided in Article 2 (commencing with Section 421).

(b) The annual fee shall be established to produce a total amount equal to that amount established in the authorized commission budget for the same year, including adjustments for increases in employee compensation, other increases appropriated by the Legislature, and an appropriate reserve to regulate public utilities less the amount to be paid from special accounts or funds pursuant to Section 402, reimbursements, federal funds, and any other revenues, and the amount of unencumbered funds from the preceding year.

(c) This article shall not apply to any electrical cooperative as defined in Chapter 5 (commencing with Section 2776) of Part 2.

(d) On and after January 1, 1985, this article shall apply to radiotelephone utilities as defined in Section 4902 as those provisions read on December 31, 1984.

(e) This section shall become operative on January 1, 2020.