Cal. Pub. Util. Code § 248

Any provision of the Public Utilities Act that is in conflict with the railroad provisions of Part A of Subtitle 4 of Title 49 of the United States Code shall be inapplicable to railroad transportation to the extent of that conflict. If any provision in the Public Utilities Act applicable to railroad transportation, or the application thereof to any person or circumstance, is in conflict with Part A of Subtitle 4 of Title 49 of the United States Code, the remainder of the act or the application of the provision to other persons or circumstances shall be unaffected to the extent no conflict exists.