It's not totally unprecedented. It's hard to count HUMINT assets too, and yet it is the subject of negotiations. Biological weapons have been similar and are

It's not totally unprecedented. It's hard to count HUMINT assets too, and yet it is the subject of negotiations. Biological weapons have been similar and are perhaps most analogous. Though, you can offer tours of your facilities and it's harder to hide large fermenters and the like. But it's much harder to identify offensive weapons research than it is offensive production.