I know Jill Sinclair has something to say here.
Let me give you a quick, upfront answer, which would be yes and no. Yes, nations do consider, as they're going along, how they ought to participate. The UN Security Council resolution is a direction unto itself, but nations have the ability to decide the extent to which they're going to offer resources, for example, and participate in a mission.
And to your second part, are nations going to be dragged along, the answer to that is no. Nations have the authority, the sovereignty, to make their own decisions on how they're going to play or not play at any stage. NATO, for example, operates on consensus.
Ms. Sinclair, do you want to answer that?