I was referring to flying
N-reg aircraft in europe on a JAR/EASA license. This is only allowed in the state of issuance.
The main controversy is with flying
N-Reg aircraft on a FAA license in europe (commercially) which was allowed before EASA-FCL and (as it seems) is going to end (read: it had already come to a stop if EASA-FCL was implemented on 08.04.2012 but the implementation got postponed because the date was a surprise to the legislation of many member states
) and how to get a license (FAA => EASA vs. EASA => FAA) based on your initial license.
I can fly a (D-Reg) helicopter whereever my JAR/EASA license is valid.