Informing Superior. An employee who is absent or expects to be absent from duty shall notify the responsible administrative officer as early as possible, and such notification shall be given in advance unless conditions beyond the control of the employee make such advance notification impossible. First shift employees should call their immediate supervisor no later than thirty (30) minutes after the shift begins. Second and third shift employees should call their immediate supervisor no later than 10:00 a.m. In the event a school site cannot be reached the employee should call Buildings and Grounds no later than the times listed above. Food service workers should call their supervisor between 8:00 a.m. and 8:30 a.m. Those who start earlier should call at least one hour in advance. Warehouse personnel should call between 5:00 a.m. and 5:30 a.m.