What does 'self-sustainability' mean?

• A. Only non-aeronautical activities should pay
• B. Only those who use aviation should pay for its use
• C. All users regardless of usage
• D. Government subsidies should be accepted

Answer: (B)

Self-sustainability means funding the operation and upkeep of the service entirely from the people who actually use it, rather than relying on external subsidies. In aviation, that means the costs are recovered from airlines, passengers, and other users who benefit from the airport and related services. This user-pay approach ensures the service can operate and invest in improvements without needing government subsidies.

So the statement that best fits is: those who use aviation should pay for its use. The other options don’t fit because shifting costs to non-aeronautical activities, charging all users regardless of whether they use the service, or accepting government subsidies would undermine the idea of funding directly from the users who benefit.