Cal. Gov. Code § 19592.2
Pending investigation by the appointing power of accusations against an employee involving any of the causes for discipline specified in Section 19572, the appointing power may order the employee on leave of absence for not to exceed 15 days. The leave may be terminated by the appointing power by giving 48 hours' notice in writing to the employee.
If adverse action is not taken on or before the date the leave is terminated, the leave shall be with pay.
If adverse action is taken on or before the date the leave is terminated, the adverse action may be taken retroactive to any date on or after the date the employee went on leave. The adverse action, under these circumstances, shall be valid if written notice is served upon the employee and filed with the board not later than 15 calendar days after the employee is notified of the adverse action.
Ca. Gov. Code § 19592.2