Government Code § 15678
PART 9.5. Office of Tax Appeals
(a) A member of the State Board of Equalization shall not represent a person before a tax appeals panel before one year after the expiration of the member’s term on the board or one year after separation from the board.
(b) The staff of a member of the State Board of Equalization shall not represent a person before a tax appeals panel before one year after separation from employment with that member.