Cal. Lab. Code § 6322

All information reported to or otherwise obtained by the chief or his representatives in connection with any inspection or proceeding of the division which contains or which might reveal a trade secret referred to in Section 1905 of Title 18 of the United States Code, or other information that is confidential pursuant to Chapter 3.5 (commencing with Section 6250) of Division 7 of Title 1 of the Government Code, shall be considered confidential, except that such information may be disclosed to other officers or employees of the division concerned with carrying out the purposes of the division or when relevant in any proceeding of the division. The appeals board, standards board, the courts, or the director shall in any such proceeding issue such orders as may be appropriate to protect the confidentiality of trade secrets. Violation of this section is a misdemeanor.