Cal. Rev. & Tax. Code § 45982

Neither the Department of Resources Recycling and Recovery, nor any person having an administrative duty under Part 9 (commencing with Section 15600) of Division 3 of Title 2 of the Government Code shall disclose the business affairs, operations, or any other proprietary information pertaining to a fee payer, except a fee payer which is a public agency, which was submitted to the board in a report or return required by this part, or permit any report or copy thereof or any book containing any abstract or particulars thereof to be seen or examined by any person not expressly authorized by Section 45981 or this section. However, the Governor may, by general or special order, authorize examination of the records maintained by the board under this part by other state officers, by officers of another state, by the federal government if a reciprocal arrangement exists, or by any other person. The information so obtained pursuant to the order of the Governor shall not be made public except to the extent and in the manner that the order may authorize that it be made public.