Cal. Pub. Util. Code § 405
If any person or corporation subject to this chapter is in default of the preparation and submission of any report or the payment of any fee required by this chapter for a period of 30 days or more, the commission may suspend or revoke the certificate of public convenience and necessity, permit, or other operating authority of the person or corporation or order the person or corporation to cease and desist from conducting all operations subject to the jurisdiction of the commission, and the commission may estimate from all available information the appropriate fee and may add to the amount of that estimated fee a penalty not to exceed 25 percent of the amount on account of the failure, refusal, or neglect to prepare and submit the report or to pay the fee, and the person or corporation shall be estopped to complain of the amount of the commission's estimate.
Upon payment of the fee so estimated and penalty, if applicable, the certificate, permit, or other operating authority of the person or corporation suspended in accordance with this section shall be reinstated or the order to cease and desist revoked. The commission may grant a reasonable extension of the 30-day period to any person or corporation upon written application and a showing of the necessity of the extension.
Upon revocation of any certificate, permit, or other operating authority or issuance of an order to cease and desist pursuant to this section, all fees in default shall become due and payable immediately.
Ca. Pub. Util. Code § 405