Scheduled time of report for duty limits is based on which time reference?

• A. Domicile Time
• B. Local Time
• C. Zulu Time
• D. Flight Time

Answer: (A)

The clock used for scheduled time of report for duty limits is the crew member’s domicile time. This means the start of a duty period is based on the time at the base where the crew is assigned, not the local time at the place you happen to be reporting or the destination’s time, and not UTC. Using domicile time standardizes fatigue and rest calculations across trips, especially when schedules span multiple time zones, so every crewmember’s duty window aligns with their home base’s day-night cycle. Local time at a temporary location could create confusion in planning, while UTC (Zulu) is typically used for flight operations timing, not for determining when you must report for duty. Flight time reflects the actual in-fly period, not the reporting reference.