Cal. Rev. & Tax. Code § 5842

The board, the Department of Motor Vehicles, the Department of Housing and Community Development and any county assessor shall exchange or otherwise provide to one another any information relevant to the regulations, titling and taxation of manufactured homes. Such information shall be held confidential by the party receiving the information, except to the extent the information is open to public inspection pursuant to Sections 408, 408.1, and 833 of the Revenue and Taxation Code, and Section 1808 of the Vehicle Code.