Cal. Pub. Util. Code § 4461

Prior to January 1, 1996, the Occupational Safety and Health Standards Board shall adopt by reference the 1992 edition of NFPA 58 Standard for the Storage and Handling of Liquified Petroleum Gasses, or as that 1992 edition may be subsequently amended or supplemented. It is the intent of the Legislature that the NFPA 58 Standard supersede any inconsistent state standards, including, but not limited to, Sections 470 to 494, inclusive, of Chapter 4 of Title 8 of the California Administrative Code. Nothing in this section prohibits the Occupational Safety and Health Standards Board from adopting more stringent standards than those in NFPA 58.