18/08/2026
Halfway across the Pacific, you're not in any country. So whose law are you under?
The answer was written into a treaty most passengers have never heard of. Under the Tokyo Convention, the law that applies is the law of the country where the aircraft is registered — not yours, not where you took off, not where you're landing.
The treaty exists because the alternative was chaos. Picture the scenario legal writers used to explain why it was needed: a passenger of one nationality, on a plane registered in a second country, flying over a third and fourth, gets into a fight with someone of a fifth nationality. Whose courts get to deal with it? Long-haul routes can cross a dozen or more countries in a single day, and without this treaty, several of them could each try to claim jurisdiction at once.
The part that actually surprises people is what the treaty hands to the aircraft commander. For the first time in international aviation law, one person got real legal power in the sky.
The commander can restrain anyone they have reasonable cause to believe is committing an offence, or is simply endangering good order on board — and can hand that person to police in whichever country the plane happens to land. Crew can be authorized to help. So, in some cases, can other passengers, acting on their own judgement if there's no time to ask.
Anyone who acts reasonably under the treaty gets a degree of legal protection for it.
There's an exact moment those powers switch on, and it isn't takeoff. It's the moment the doors close.