[QUOTE=sethb;35098706]Which Health Department has jurisdiction over a plane in flight?[/QUOTE
Usually the State of Registration of the Aircraft, but when the aircraft is registered in a different state from the Carrier then it’s the state where the AOC is issued. Simple terms BA aircraft it’s UK law. US law is not the primary law on BA aircraft in flight, though they may follow some provisions of the US where that is mandated for aircraft flying into US airspace. Once on the ground with the doors open it’s the law of the land you are in. Can get messy if you contravene a law that is extant on the aircraft but not in the state you you land in to offload a transgressor. A subject for a specialist lawyer, but the important thing is that Aircraft Commanders have very large power whilst airborne and can can take any act they deem necessary for ensure the safety and regularity (legal term for normality not schedule) of that flight.