My take again will be they will either ignore the regulation until such a time as they are forced to account for themselves, and then probably employ the services of a dual rated pilot to sit in the left seat.
-Debiassi
The ruling applies to all pilots domiciled within the EASA member states, regardless of seat position.
Whether EASA have the will and the teeth to enforce this ruling is another matter entirely. I would be surprised. So far, it seems they won`t and I`m sure foreign licensed pilots are quite safe insofar as license enforcement. The real issue is insurance. An insurance claim involving a non- EASA licensed crew and an EASA based aircraft... I wouldn`t want to be counting on that payout.