I'll do a search, so any pointers are helpfull..
EU directive for mobile workers in aviation may only fly maximum 900 hours blok, with a planned FDP of max. 2000 hours ( which includes all standby time etc).
So 900 hours is the magic word. The planned 2000 hours are
to be notified PRIOR to working, so they can't plan in reverse, and use 2000 as a target figure !
Ohh, and the hours has to be spread evenly over the year !!