Originally Posted by acl65pilot

The big difference is that you can be on a trip, and not on duty, but not from company obligation. For many regional drivers here, they had in their contracts a calender day off at home in seven not a 24 hr period free from duty, which could be "rest" in the middle of a trip. Many people confuse the two.

They can also assign you a trip that reports after this rest period ends while you are on it.