Policy and Application. Absence for non-occupational and occupational sickness or injury may be charged to sick leave credit, as defined in this Article. It is understood that a good attendance record is required. In determining what constitutes a poor attendance record, particular at- tention will be given to such factors as the number of separate occasions an employee is absent during the year, the reason given for such absences, the duration of each occasion, the number of absences taken adja- cent to weekends and Holidays, and the total annual usage over a three-year period, provided the employee has accumulated three years’ service.