Cal. Code Regs. tit. 5 § 43588.3
A nonacademic employee shall be required to serve only one probationary period to gain permanent status. If such an employee is promoted to a position with substantially different duties or to a position that requires additional duties and abilities, the employee shall serve an additional probationary period; but if permanent status is not awarded in the new position, the employee shall have the right to return to any class in which he or she had permanent status. A permanent nonacademic employee may, with the employee's consent and the approval of the appointing power, be employed at less than full-time and retain permanent status. Seniority credit and any other credit shall be gained only in the proportion the actual time employed is to full-time employment in the position.
Cal. Code Regs. Tit. 5, § 43588.3
Note: Authority cited: Sections 66600, 89030, 89035 and 89500, Education Code. Reference: Section 89533, Education Code.