the scheduling of rest periods between 18 and 30 hours especially after long flights crossing multiple time zones
This is data based primarily on day / night rotations - might be little out of date nowdays with so much work going into FRM
Remember, 1 day more away is 1 day less at home so fill out ASRs for the right reason not just because you want a longer layover. If you are fatigued don't hesitate to put it down on paper, if you are fatigued you should not be going to work, it's your licence if something happens. If you believe fatigue is an issue keep a journal of your sleep patterns, time you eat and drink and what you eat and drank, if you could access room service at that time or get access to food at that time you were awake, if you had a disturbed sleep what time you were awoken and got back to sleep, time you arrived at the hotel and got to your room and times you vacated your room and hotel etc etc so it is all documented to help highlight your report down the track. At the end of the day the more data that is provided the harder it becomes to be ignored.
Wise words