EASA Licence
 

If you are operating an FAA biz jet in Europe and are a European resident must you have the EASA equivalent of your FAA Licence and Type Rating. If so where does it say so in the regulations.

It's nothing to do with the residency of the pilot. It is the operator of the aircraft that matters. If they can legitimately say that the operator is based in the US, then no need for an EASA licence. If the operator is Europe based then ORO.FC.100 (b) applies which says that all crew must have a licence issued under Part-FCL. That doesn't mean they don't also have to have the licence required by the state where the aircraft is registered.

I hope that helps!

Interestingly, Part 61.3 (a) (1) (vii) says: When operating an aircraft within a foreign country, a pilot licence issued by that country may be used. Which would suggest that in certain circumstances you don't even need an FAA certificate.

That's correct. The issue is that although European licences are all EASA licences, they are still issued by the individual countries. So a German licence is only valid on FAA aircraft within Germany, etc, which is not a lot of use for most biz jet ops; they tend to fly internationally!