There is a distinction in sub part Q between flight duty and duty. Rest is as stated above, free from all duty. The flight duty period ends at a standard time agreed with your operator's aviation authority, in our ops case 30 mins after on block time. This time should allow for all post flight duties. If you have extra duties not associated with the flight duty (a grey area) these are not counted as flight duty, but are still duty and cannot be rest. Rest starts in my log when I am free from all duties. If I have no other duties than flight duty it starts at the end of my FDP. Minimum rest is 12 hours at home base, 10 hrs away from home base. However the minimum rest must be at least as long as the preceding duty period if this is longer than the 10 or 12 hours mentioned.