Interesting ltr though, basically Barry is saying; when you are all done testing your missiles just let us know and we'll agree that you are in compliance.
They violated the chemical/bio weapons pact plenty. I’m sure they had all their ICBMs at full mirv despite treaties. We always downloaded them.
They had refrigerated SS-18 ICBMs with smallpox in them during the 70s and 80s and who knows now. They’ve never even tried to do their part on any weapon treaty.