With respect, most airlines are operating on schedules and know when they'll have flights going from airports, so they don't have them going 24 hours a day. If they're non-scheduled airlines, they will know what their charter schedules are, so they will be able to inform whatever authorities they need to of their schedule. As I said, you can draw the worst conclusion here about resources, but I don't think that necessarily is what will happen in practice.
On March 31st, 2015. See this statement in context.