It’s the same rules. People incorrectly think that it’s a set time of 1000 as long as it’s on your schedule no later than 1500 the day before, but actually coming off any x day you can be assigned a trip reporting as early as 10 hours after the start of LC as long as it’s on your schedule no later than 9 hours before the start of LC. So the 1000/1500 works if your LC starts right at midnight as it traditionally does. However PB/PR will throw this off, as well as a assigned 30 hour rest. So if your PR ends at 0604, you can be assigned a trip (or SC) reporting as early as 1604 (10 hours), as long as they put it on your schedule by 2104 (9 hours prior to LC) the night prior.