"Provided the debris is reasonably proved to be from MH370, the world's press will be scrambling to charter planes to fly over that area for photos.
Given that these are "uncharted" waters, what chance is there of that? And who has permission-giving rights or will it be a melee?"
Well, if the Aust Gov't releases the photos, no need and removes any chance of a melee.
And what chance has a charter aircraft got of finding by eye sight a spec in the ocean ?
Yes, Australia could declare a no fly zone which they might need to do if you have multiple search aircraft flying around at various levels.