Which of the following describes a key responsibility of AVOP holders?

The key responsibility of AVOP holders is to ensure compliance with airside regulations. This role is critical for maintaining safety and security in the airside environment, which includes operations on the runways, taxiways, and other restricted areas of the airport. Compliance with these regulations helps prevent accidents, incidents, and unauthorized access, which are vital for the safe operation of aircraft and the security of airport operations. AVOP holders are trained to understand these regulations and are expected to adhere to them while performing their duties, which encompass driving airside vehicles and interacting with various airport operations.

The other responsibilities associated with the remaining choices do not encapsulate the primary focus of AVOP holders. While assisting passengers, maintaining cleanliness, and monitoring fuel levels might be important tasks within airport operations, they are not the main focus or requirement for those holding an AVOP. The AVOP training specifically emphasizes the importance of understanding and adhering to the airside regulations as a foundational element of safe airport operations.