Which operational requirement must be followed when ferrying an air carrier airplane with one engine inoperative?

When ferrying an air carrier airplane with one engine inoperative, it is crucial to ensure that the weather conditions at both the departure and destination airports are VFR (Visual Flight Rules). This requirement is in place to enhance safety because flying an aircraft with only one operational engine significantly reduces its performance capabilities. VFR weather conditions typically imply better visibility and enough cloud clearance, which are essential for pilots to maintain visual reference and navigate safely, especially in an emergency situation where engine failure might necessitate an immediate landing.

Meeting VFR requirements ensures that the pilot can effectively manage the flight and maintain situational awareness, which is vital when flying with reduced power. It is pertinent for the safety of the aircraft, crew, and any potential passengers. Other options do not specifically address the performance implications of flying an aircraft with only one engine operational, nor do they encapsulate the same regulatory and safety standards as the requirement for VFR conditions.