CELL PHONE POLICY. In the event all other UMASS Medical School units agree to a cell phone policy, the parties will re-open negotiations solely to negotiate over a cell phone policy.LETTER OF UNDERSTANDING An unscheduled absence is any period an employee does not report to work during his/her scheduled shift, excluding approved vacation time, sick time, personal time, compensatory time, or other approved leaves of absence. Absences listed below are not considered unscheduled absences for purposes of the UMMS Attendance & Punctuality Policy: