Cal. Pub. Util. Code § 322.5

The commission shall determine, as part of the proceeding in Rulemaking 98-07-038 (Rulemaking for purposes of Revising General Order 96-A Regarding Informal Filings at the Commission) or any other appropriate proceeding, as determined by the commission, the feasibility of submitting advice letters to the commission through electronic means. If determined to be feasible, the commission shall, within six months, propose a plan for submitting advice letters by electronic means. For purposes of this section, “electronic means” include electronic mail and electronic forms developed or approved by the commission and submitted through the commission’s Internet Web site.