Perfect Attendance PAT is awarded automatically in your CATS record after 6 months of no occurrences. Keep in mind 6 months is not an absolute 180 days due to each month having various days of the month.
All occurrences/absences, including but not limited to bereavement, commuter, cola, Personal Leaves, Dependability Waivers, FLA, MED, OJI, etc, except for JUR and VAC, interrupt PAT.
Perfect Attendance also rolls off CATS just like any other occurrence and all absences, except for JUR and VAC interrupt the Perfect Attendance period.