Depends somewhat of the local rules around subpart Q. In germany it is perfectly legal to plan a duty of up to 18 hours provided there is a break of at least 3 hours in there where the employer provides a minimum standard resting place (a quiet room with a bed), however if the duty period exceeds the subpart q max flight duty period the pilots are not allowed to be at the controls for more than 10 hours and not more than 2 landings after the break can be planned. Discretion can not extend that period or the number of landings.
This part of the regs is quite often used in my company, in many cases for a shorter than min rest night stay which can be vicious for our sleeping patterns if combined with min rest during the day.