Where must all ground support equipment and ground motor vehicles not in operation be parked?

The requirement for parking ground support equipment and ground motor vehicles not in operation within the airline tenant leasehold lines is crucial for maintaining operational efficiency and safety at the airport. This area is specifically designated for airline-related activities, ensuring that vehicles and equipment are close to the terminals and operational areas without disrupting passenger flow or service.

Parking equipment in this designated space helps minimize potential hazards and allows for better management of space within the airport premises. Additionally, it aids in maintaining a clear and organized environment for airport operations, facilitating easier access for grounded vehicles to return to service when necessary. This locations ensures that vehicles do not interfere with emergency access routes or other important operational areas, which is essential for airport functioning and safety protocols.

The other options do not meet these operational and safety requirements. For example, near terminal entrances could disrupt passenger movement, while outside security perimeter fences may create security vulnerabilities. Designated service areas only refers to specific zones intended for active usage rather than parking non-operational vehicles. Thus, the selected option correctly indicates where these vehicles should be parked.