Which of the following is NOT a source of non-aeronautical revenue?

Passenger Facility Charges (PFCs) are fees assessed on airline tickets that are collected by airports to fund projects that improve safety, security, and capacity, or that enhance the passenger experience. These charges are directly related to the use of aeronautical facilities and services because they are applied specifically to airline operations and the associated terminal activities.

In contrast, rental car fees, advertising space, and parking lot charges represent non-aeronautical revenue streams because they are not directly related to the operation of aircraft or the movement of passengers through the airport in relation to air travel. These sources of income derive from activities and services that are ancillary to the actual aviation operations, falling into the realm of commercial enterprises that utilize airport property.

This distinction is important for understanding airport revenue structures and the various ways airports can generate income beyond the aeronautical activities that primarily drive their core business.