As long as Denny is asking a question he says he should know the answer to and doesn't, I'll making him feel better by doing the same because I can't find the actual paragraph anywhere in the contract.

A reserve pilot gets a trip assigned and it ends at 21:30. So 22:00 de-brief.

While they're out flying that trip's last day, scheduling is assigning trips for the next day. Can this reserve be assigned a trip the next day that is 10 hours after their current trip ends, which would be 08:00, or in advance is it still 12 hours between rotations, so nothing earlier than 10:00 sign-in?