What I'm saying is that you are giving the board to much credit. The CEO would have fully developed the jetstar plan and presented to the board. The board might have got some advice, but at the end of the day they would have approved it and told the CEO to do it.
The CEO then runs the plan. The plan might have been as broad as jetstar does leisure routes. So switching holiday routes to jetstar might fall entirely with the CEO. Even if the board what to know about route changes it might be as simple as the CEO saying "you know that Jetstar plan? Well it requires us to switch FRA to jetstar". Board rubber stamp.