Thank you Bookworm.
I note that your extract doesn't allow the state to ban its citizens from flying a foreign reg plane on a foreign license. It merely bans overflight rights. I should think that any country can ban overflight, arbitrarily.
But are there examples of this in the "civilised world"?
I heard that Germany was more strict than some in the maximum age of a captain, in a situation relevant to cargo operations. In reality it was not enforced because nobody knows the age of the man at FL370. But this isn't the same thing.
If so, are there examples which distinguish between AOC and non-AOC ops?