I don't know if that's a regulation, but I know it is the practice right now, in that the goal of that closing the seam work is to ensure that nobody is released from the armed forces until they are ready. That means, their benefits are in place, their family is stable, and they are emotionally and physically ready to leave.
If it's a Queen's regulation, a QR&O, I'll find out, but it is the practice right now. It is the critical element in that closing the seam work that's being done.