Thanks.
I haven't found anything regarding this matter but old JAR FCL 1.
Are you talking about UK stuff when you mention aircrew regs ?
Does easa has anything about regulation on its website ?
I am italian so I did not serarch UK CAA. For sure they have better info, but I thought easa had something.
I fly GA in Italy and I have more than 2000 hrs FAA FI IRI MEP (flown in the past in the US) and I'd like to get the same FI ratings here and see if I find the way to instruct a little bit in Italy too.