Final answer:
The responsibility for ensuring aircrew members get sufficient rest lies with both the airline operators, in compliance with FAA regulations, and the individuals themselves, who must manage their rest time effectively.
Step-by-step explanation:
The responsibility for ensuring that aircrew members receive sufficient rest during a crew rest period primarily falls on the airline or operator, as well as the individuals themselves. The Federal Aviation Administration (FAA) sets regulations that limit how long pilots and other crew members are permitted to work without an overnight break. These regulations are designed to prevent fatigue and ensure safety in aviation operations.
Airline companies need to strictly adhere to the FAA regulations and schedule crew duty periods and rest times accordingly. Meanwhile, aircrew members also have a responsibility to manage their off-duty time effectively to obtain adequate rest. The ultimate goal is to maintain safety and prevent workplace accidents.