California Code, Revenue and Taxation Code - RTC § 9430

(a) The board shall make available any and all information obtained under this chapter to any member jurisdiction of the IFTA, a designee of the member jurisdiction, or any contractor under contract with the board. The information obtained by the member jurisdiction, designee, or contractor shall not be made public except to the extent authorized by the agreement.

(b) The member jurisdictions of the IFTA and the board may utilize any information obtained pursuant to this chapter to develop data on international or interstate commerce, fuel consumption, and any aspect of motor fuel tax administration.