Originally Posted by
flyboyike
Interesting...So then a Cathay Pacific pilot who is flying an Australian-registered airplane in HK airspace while carrying a US certificate is in violation of ICAO rules? Or how about a Canadian pilot flying a Bahamas (VP-) registered airplane into the UK? I could go on, but you get the idea.
You can hold more than one pilot certificate. What many countries do is issue a pilot a validation based on their pilot's certificate. For all intents and purposes, it is a pilot certificate for that nation, but is issued on the basis of the pilot's national certification.