Originally Posted by tennisguru

If they did not release you early on the 6th into rest or delay the start of your LC on the 8th then you did not get a 30 hr break. They could assign you a 4 day trip that starts on the 8th as long as it has a 30 hour layover on the 9th or 10th.

To answer your bolded part you are legal to start a trip that does not have a 30 hour layover but you would be illegal to start your FDP on the 10th.