Which items are allowed in carry-on/checked bag with operator approval?

• A. Ammunition
• B. Alcoholic beverages
• C. Lithium battery cells under a certain amperage
• D. Medical Oxygen

Answer: (D)

Medical oxygen is the item that can be carried with operator approval because it is a life-support medical device and airlines have established safety procedures to allow its transport when proper documentation and equipment requirements are met. You’d typically need a doctor's note or medical clearance and the oxygen gear must meet safety standards (such as a portable oxygen concentrator or a non-spillable cylinder) with the airline approving its use on the flight.

Ammunition, alcoholic beverages, and lithium battery cells are subject to stricter, general safety rules and are not granted simply through operator approval in the same way. Ammunition requires specific permits and handling limits, alcohol is governed by container and duty-free rules, and lithium batteries carry energy and packaging restrictions that usually limit how they can be carried and where.