Ed. Code, § 87770

Every employee, as a condition to being granted a leave of absence pursuant to Section 87767, shall agree in writing to render a period of service in the employ of the governing board of the district following his or her return from the leave of absence which is equal to twice the period of the leave. Compensation granted by the governing board to the employee on leave for less than one year may be paid during the first year of service rendered in the employ of the governing board following the return of the employee from the leave of absence or, in the event that the leave is for a period of one year, the compensation may be paid in two equal annual installments during the first two years of service following the return of the employee. The compensation shall be paid the employee while on the leave of absence in the same manner as if the employee were teaching in the district, upon the furnishing by the employee of a suitable bond indemnifying the governing board of the district against loss in the event that the employee fails to render the agreed upon period of service in the employ of the governing board following the return of the employee from the leave of absence. The bond shall be exonerated in event the failure of the employee to return and render the agreed upon period of service is caused by the death or physical or mental disability of the employee. If the governing board finds, and by resolution declares, that the interests of the district will be protected by the written agreement of the employee to return to the service of the district and render the agreed upon period of service therein following his or her return from the leave, the governing board may waive the furnishing of the bond and pay the employee on leave in the same manner as though a bond is furnished.