Cal. Education Code § 45108

If the governing board of any school district establishes positions in the categories described below and restricts initial appointments of new employees to persons in low-income groups or residing in specifically designated areas of the community, then such positions shall, in addition to the regular class title, be classified as “restricted.” The positions shall be part of the classified service and persons so employed shall be classified employees for all purposes except that (1) they shall not be subject to the provisions of Section 45272 or 45273, and (2) they shall not acquire permanent status or seniority credit and shall not be eligible for promotion into the regular classified service until they have complied with the provisions of subdivision (c) of Section 45105. The categories of positions for which the governing board may establish restrictions under this section are: (a) The position of instructional aide, as defined in Section 45343. (b) Any other position involving personal contacts with pupils or parents, that is established to assist school staff personnel responsible for school-community relations; educational support services for such areas as counseling, library, or health; or the correction or prevention of behavioral problems. This section shall apply to districts that have adopted the merit system in the same manner and effect as if it were a part of Article 6 (commencing with Section 45240) of this chapter.