Cal. Welf. & Inst. Code § 1772
(b) Notwithstanding subdivision (a), all of the following shall apply to a person described in subdivision (a) or a person honorably discharged by the Board of Juvenile Hearings:
(3) The conviction of the person for an offense listed in subdivision (b) of Section 707 is admissible in a subsequent criminal, juvenile, or civil proceeding if otherwise admissible, if all of the following are true: