Actually only the 3 Mxx franchise holders are allowed to operate pushback tugs on HKIA.So HKA cannot operate its new tug unless it gains a franchise as a MRO and I do not think the other franchise holders will agree to that,Perhaps HKA should have asked the question first.............HKIA is a franchise operated airport.Airlines can handle themselves as per ICAO agreements but any service such as pushback/towing/toilet/water servicing/specialised equipment can only come from the 3 franchisees(Haeco/Casl/Papas).So while HKA can do its own check in/flight handling/maintenance it must use one of the franchised companies for the other services.Welcome to Hkg/Hkia a open and competative city..........NOT.