Cal. Educ. Code § 89543

(a) The trustees shall adopt regulations for determination of the order in which nonacademic employees shall be laid off for lack of funds or because of lack of work. To the extent the trustees shall deem practical such regulations shall provide for layoff in the inverse order of employment.
The trustees shall adopt rules governing the reemployment of nonacademic employees laid off, pursuant to this section. To the extent the trustees deem practical, such regulations shall include provision that for a period of five years following layoff, an employee shall have a preferential right to reemployment in the same or a comparable position, in the event of a vacancy. This preferential right shall give the employee laid off the right to reemployment in a position comparable to that from which he was laid off over any person not employed at the time the particular employee was laid off.
(b) If the provisions of this section are in conflict with the provisions of a memorandum of understanding reached pursuant to Chapter 12 (commencing with Section 3560) of Division 4 of Title 1 of the Government Code, the memorandum of understanding shall be controlling without further legislative action, except that if such provisions of a memorandum of understanding require the expenditure of funds, the provisions shall not become effective unless approved by the legislature in the annual Budget Act.