CA Gov't Code Section 69906.5

Notwithstanding Section 270 of the Welfare and Institutions Code, in Mendocino County the offices of assistant probation officer and deputy probation officer, or either of them, shall exist only if established by an ordinance adopted by the board of supervisors; and the probation officer may appoint one or more deputy or assistant probation officers only if the positions have been authorized by the board of supervisors.