When can remains be shipped without processing?

The correct answer highlights a scenario in which remains can be shipped without undergoing the typical processing that is usually required. Specifically, when an aircraft is scheduled to leave within a short time frame, such as two hours, it allows for expediting the transportation of remains due to urgent logistical needs. This can often occur in situations where there is a time-sensitive need to transport remains quickly, ensuring they are moved without delay to meet the flight's departure schedule.

This provision addresses the necessity of acting swiftly in specific operational contexts, where processing might not be feasible due to time constraints. In such situations, the focus is on ensuring that the remains reach their destination as rapidly as possible, which is critical in emergency circumstances. Therefore, this option is essential for understanding the protocols in place for handling remains efficiently under time pressures.