That is incorrect. It will depend on what time of the day the flight departs. Most flights that will be allowed to fly over 8 hours will have to depart at 8 or 9am. That means transcons. Also, there would be a limit on duty hours, like 13 hours max per day, and only 2 legs. If you do a 10 hour roundtrip, with an hour on the ground in LAX, that doesn't give you much wiggle room for running out of duty day. For North Atlantic crossings and allnighters in general, the regs will be tighter.