Cal. Gov. Code § 15605
The secretary shall keep an accurate record of the proceedings of the board in a book specially provided for such purpose. When required by the board or the chairman he shall visit the several counties, collect data and information relative to the assessment of property or railway property in the county, consult and advise with all officers charged with enforcement of the revenue laws, and report such data and information to the board. Annually he shall prepare the report of the board to the Governor, and when printed shall distribute the report as required by law and as directed by the board. He shall do and perform all other acts and things enjoined by law or required by the board. The secretary is a civil executive officer and is authorized to administer and certify oaths in any county in the State.
Ca. Gov. Code § 15605