Any incidents or violations have always been rigorously followed up with appropriate action.
That only happens if they can get there hands on the pilots. Which is the reason why the pilots leggit if possible ASAP after anything happens.
All the local authority can do is send a letter to the other authority if they don't reply they can only hope they can pick the pilot up on another visit.
The idea that the US, China, Russia and a raft of other countrys would deport anyone to the EU to face action about infringments is quite frankly in the realms of cloud cockoo land. Try and find a case when its happened.
We arn't actually making the argument for EASA we are making the argument that local aircraft and local pilots are under the oversight of the Local NAA. Most I would suspect would agree that EASA is a monumental screw up and isn't going to do the EU aviation industry any good at all. In fact the conclusion of getting the N reg issue sort once and for all might actually be the thing that keeping it together. Most countrys in the EU have been trying to stop it for years and they have been the nearest to succeeding yet.
Doesn't change the fact though that I agree with the policy of local aircraft and local pilots are under the oversight of the Local NAA. That aircraft resident in a country and flown by the resident pilots should have to jump through the same hoops as everyone else.
None of the loophole of we have payed a bloke in Delware to own the aircraft in trust on our behalf and you can stick your rules up your arse cause we don't like them.