The payloads were supplied pre-Gulf war by the US, Fangorn. All of the munitions found date to pre-Gulf War, when the US was still not only friendly with secularist Iraq (and the Baathist party that the US and UK originally put in power), but while the US was hoping they would keep Iran in check for us. Had you forgotten this happened?
That is when the payloads we gave them and sold them were put into Iraqi shells. That is also why they really don't want to say too much about the origins of these payloads.
Also, this is NOT breaking news. The only snippet of this that is breaking news is that the document was declassified. Over 450 of the approx. 500 weapons recovered were recovered before May 2004. This was reported on in May 2004. Including the nature of the weapons and predictions as to the retained potential strength of the munitions. Also the source of the payloads was reported on.
The last "Key Point" is the most hilarious to me: "It has been reported in open press that insurgents and Iraqi groups desire to acquire and use chemical weapons."
This is funny from a few angles.
The first I noticed is that they seem to find it necessary to explain that insurgents—whose sovereign soil has been invaded and whose government has been overthrown by a foreign power—would like to obtain and use (fill in the blank with your favorite weapon). Duh! In Bill Engvall fashion, I add, "We know there are old munitions buried and long forgotten dotting Iraq, but we would rather throw a rock or use a small IED that can only do minimal damage and will never convince this foreign invasionary force to leave our country. Here's your sign."
The second is the redundancy in the statement "insurgents and Iraqi groups." By definition, insurgents are Iraqi's. It's like saying "country and nation."