Hey Guys,
What's the fight about
First of all what type of operations are we talking about? Private or under AOC ? What do you meant under "Based" (It's not always the place where the a/c is parked most of the time)?
For me personally it's very easy:
1. If the aircraft is privately operated the pilot should be compliant with regulation of the state of the registry.
2. If the aircraft is operated commercialy (under AOC) the pilot should be compliant with the regulation of the state of issuance of AOC.
and it has nothing to do with where the aircraft is "based" .
Correct me if i'm wrong