EASA
I'll put a few bob (no.. not you Mr T) on EASA rules bieng adopted in the majority with a couple of FAA (JAR) ones thrown in for good measure.
The only real problem is, how long will it take Dept of Legal to actualy draft the things in a form suitable to them.!!
PS Mainframe, I'm all TOOTLE PIP'ed out - get a new monica!