A service charge may be payable by a passenger who: 5.6.1. fails to arrive at Carrier's check-in-location at the airport or other point of departure by the time fixed by Carrier (or if no time fixed, sufficiently in advance of flight departure to permit completion of government formalities and departure procedures) and therefore, does not use space for which a reservation has been made for him, or 5.6.2. appear improperly documented and, therefore, not ready to travel, and as a consequence thereof does not use space for which a reservation has been made for him, or