California Code, Revenue and Taxation Code - RTC § 1626.1

Notwithstanding Section 1623, the board of supervisors of any county which has one or more assessment appeals boards in existence pursuant to this article may by ordinance increase the number of such boards effective from and after the first Monday in October and such boards shall remain in existence until discontinued under the provisions of Section 1626, but in no event shall the term of office of any member of the board exceed three years. Each term of office shall expire in a different calendar year.