Honestly I wouldn’t be surprised if the big players have replaced chemical weapons with something just as horrible but more “smart” like micro-drones with explosive charges and facial recognition.

somewhere by secret services or criminal enterprises.

You say that as if they are two separate things.

Thus the quotes.

This is still pretty big, though. I imagine further legislation will be easier if the negotiators can say that legally nobody has any chemical weapons right now.

Of course, I’m sure there’s facilities that could start making them in a hurry.