Thanks Pete, I have to say you've livened up this sites ISS coverage 100 fold.
For a layman like myself you'd think this rack has a lot of reconnaissance potential, either testing or operational. Are there agreements preventing such usage?
Thanks for the compliment.
If the reconnaissance was for military purposes, then yes, the are agreements preventing such usage.
The ISS cannot be used for military purposes by any nation. In 2008, when Russia invaded Georgia, there was a big stink when Roscosmos had a cosmonaut take photographs of the invaded area and send them down to the ground. They got out of it by saying that the images were only for the purposes of assisting with humanitarian efforts.