This is an agreement that it doesn't grab any rights from the photographer, but it's a bit awkward: what does it mean the end of the first point "...and only during the period from the date of the Show until..."? Do these people know what is internet? An article when is up is up, there is no such things as posts that expires after a while. And what on printed magazines? Do they have to burn all the copies after a month? Who writes these agreements? A drunk monkey?