Beancounters account for long term leased assets (like an airport leased for 50 years with a 49 year option) as being “owned” by the lessee. But the legal owner of Tulla remains the Commonwealth. Tulla is a ‘core regulated airport’ for the purposes of the Commonwealth Airports Act.
Same thing happens with aircraft. Most airlines are not the legal owner of the aircraft they operate. They’re leased.