But isn't that simply the default position, for all aircraft without an ICAO CofA?
Without an ICAO CofA, you have zero "right" to fly anywhere in the world whatsoever.
The only reason you can get airborne at all, in your home country, is because your local CAA has the appropriate jurisdiction and allows it. (OK you could argue that in a free country everything not banned is permitted, but you know what I mean...).
To fly to another country, their CAA has to allow it too. Either individually or under some blanket agreement.
Like it or not, this is the price for not having an ICAO CofA.