Regulations which refer to operations relate to which person?

The correct answer highlights that regulations which refer to operations pertain to anyone who is responsible for the actual use of the aircraft, including those who may authorize its use. This includes not only the pilot-in-command but also individuals such as the aircraft owner, operators, and any other personnel involved in the management or oversight of the aircraft's operations.

Understanding this broader context is vital, as aviation regulations impose responsibilities that extend beyond just the actions of the pilot. For instance, the owner or operator of the aircraft has legal and safety obligations to ensure that the aircraft is maintained, compliant with regulations, and properly utilized. This collective responsibility is crucial for ensuring safe operational practices in aviation.

In contrast, the focus on just the pilot-in-command, the owner, or flight crew members would overlook other critical individuals in the operational chain who also influence compliance with aviation regulations. Thus, recognizing the inclusive nature of responsibility helps to ensure accountability and adherence to safety protocols across all levels involved in the operation of lighter-than-air aircraft.