Section 493 Of Article 2. Tariff Schedules From California Public Utilities Code >> Division 1. >> Part 1. >> Chapter 3. >> Article 2.

. (a) No common carrier subject to this part shall engage or participate in the transportation of persons or property, between points within this state, until its schedules of rates, fares, charges, and classifications have been filed and published in accordance with this part.
  (b) If any common carrier of property, in contravention of subdivision (a), transports any property for which it does not have schedules of rates, fares, charges, and classifications on file, the commission may establish a just and reasonable charge for the transportation.
  (c) This section is not applicable to network railroad transportation.