Actually Mensa, you highlighted a common misunderstanding....
FLIGHT Duty Period (FDP) ends at chocks on, however DUTY Period ends 30 mins AFTER chocks on.
So if you chock on in Dubai at 2200, you cannot be on duty again until 1030 the next day (12 hrs 30 mins after chocks on).
Just a small point, but commonly incorrectly applied.
