(a) Any employee absent from work without authorization shall be placed on leave without pay. In the event an employee's unauthorized absence continues for 10 consecutive workdays and the employee has not provided a written explanation for such absence to the chief administrative officer by the close of business of the 10th workday following the commencement of such unauthorized absence, the employee's leave-without-pay status shall continue for the remainder of the semester in effect on the 10th consecutive workday of absence where the college has hired a replacement for the employee.

(b) If the unauthorized absence without written explanation continues for a total of 30 consecutive workdays, the employee shall be deemed to have resigned.

(c) If, prior to being deemed to have resigned, an employee provides suitable medical evidence in accordance with section 337.10(c) of this Part which substantiates a claim of temporary disability, the employee may be placed on sick leave. Any sick leave under this subdivision shall commence upon substantiation of a claim of temporary disability by suitable medical evidence.