To when does a 72-hour quarters period extend?

To when does a 72-hour quarters period extend?

• A. End of day three.
• B. Start of the second day.
• C. Start of work on the third day.
• D. Midnight of the day after.

Answer: (C)

A 72-hour quarter is a three-day duty window that ends when the next work-day begins, i.e., the boundary is tied to the start of a work period rather than to a calendar midnight or the end of a day. If you start the quarter with the first moment of work on a given day, the three-day block runs through the ensuing two full days and then ends as the third day’s work begins. That moment—the start of work on the third day—marks the completion of 72 hours. The other options don’t align with how these duty windows are anchored. Ending at the end of day three would push the boundary beyond 72 hours, starting on the second day happens too soon, and midnight of the following day is governed by calendar time rather than the start-of-work boundary used for quarters.

A 72-hour quarter is a three-day duty window that ends when the next work-day begins, i.e., the boundary is tied to the start of a work period rather than to a calendar midnight or the end of a day. If you start the quarter with the first moment of work on a given day, the three-day block runs through the ensuing two full days and then ends as the third day’s work begins. That moment—the start of work on the third day—marks the completion of 72 hours.

The other options don’t align with how these duty windows are anchored. Ending at the end of day three would push the boundary beyond 72 hours, starting on the second day happens too soon, and midnight of the following day is governed by calendar time rather than the start-of-work boundary used for quarters.