California Code, Education Code - EDC § 44894

(a) A permanent employee not qualified to render service as a classroom teacher, when advanced to an administrative or supervisory position, or assigned any special or other type of work, or given special classification or designation requiring certification qualifications, shall retain his permanent classification for the performance of the type of service for which he was qualified prior to such advancement, assignment, or special classification or designation.

(b) If an employee is authorized to render service in more than one type of position for which certification qualifications are required, either by virtue of his possession of one certification document authorizing service in two or more of such positions, or by virtue of his possession of separate certification documents authorizing service in two or more such positions, or any combination thereof, he shall, upon satisfying all other requirements prescribed by law, acquire permanent status as follows: