Logging ULR time in an EASA Logbook

[MontyWithnail]

Hello, this is probably an old chestnut, but search hasn't enlightened me so far..

I'm based outside the EASA area and have recently started doing long augmented trips with three or four crew. My main licence is an EASA one though and all my time until recently was logged in Europe.

So, I would like to know how augmented time is logged in Europe, as i would like my logbook to remain compliant with EASA. Basically - how do Lufthansa, Air France and BA log stick time vs rest time on long sectors?

Ideally i would like a reference for an EASA document which lays down the law on this? I've searched on their impenetrable website and got nowhere!

Thanks.