Cal. Educ. Code § 45403

This article shall not be construed as requiring school districts to replace existing classified personnel or to employ additional classified personnel. However, in any case in which additional classified positions are added to the administrative staff of a school which does not already employ a person as described in Section 45401, or if a vacancy is to be filled in a classified position in the administrative staff of such a school, the provisions of Section 45401 shall be adhered to in filling such position.