EDC § 45259

If the governing board of any school district establishes positions and restricts initial appointment of new employees to mentally, physically, or developmentally disabled persons, 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 they shall not be subject to the provisions of Section 45272 or 45273, and that 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.