[This contribution appeared orginally in Arms Control Law, and was in reply to a discussion on the blog. Links to the original arguments are included. – Jean Pascal]
This discussion between Marco [Roscini] and Dan [Joyner] on Article VI of the NPT and customary law is instructive.
In this particular case, Marco’s application of the notion to a single article rather than the totality of the treaty puzzles me. I would tend to agree with Dan’s counterpoint. However, Dan then refers to the CWC in its entirety to draw an analogy. In my mind a bit problematic for two reasons:
1. The CWC is a disarmament, rather than a non-proliferation treaty. It means that the weapon category in its entirety is banned and no exeception exists for any state, whether big or small; whether powerful or weak. However, more to the present discussion, as a consequence of the CWC being a disarmament treaty (i.e., going to zero and remaining at zero in the future), the convention is final. It does not have aspirational articles with regard to ambitions not covered by its own text.
2. Article VI of the NPT resembles more of Article IX of the BTWC:
Each State Party to this Convention affirms the recognized objective of effective prohibition of chemical weapons and, to this end, undertakes to continue negotiations in good faith with a view to reaching early agreement on effective measures for the prohibition of their development, production and stockpiling and for their destruction, and on appropriate measures concerning equipment and means of delivery specifically designed for the production or use of chemical agents for weapons purposes.
I find it difficult to see how this article could have turned the BTWC into a CW disarmament treaty (as proponents of nuclear disarmament often tend to do with regard to Article VI of the NPT) or how it could reflect on customary law regarding CW, even if considering that most people view the 1925 Geneva Protocol banning the use of chemical and biological weapons as having entered into customary law.
Just like the CWC, the BTWC is also a disarmament treaty and has similiar finality with regard to biological and toxin weapons. Nevertheless, I would argue that the BTWC today, despite having fewer parties than the CWC, fits more firmly into customary law: no state actually claims having BW or maintaining an offensive BW programme. (For example, in an interview in Der Spiegel on 19 January 2009, Bashar al-Assad more than implicitly admitted to CW, but flatly denied BW.) This has important implications from an armament/disarmament perspective: there is no space whatsoever for testing weapons in the field, training troops or developing military doctrines for their use on both the strategic and tactical levels. Even for states not party to the BTWC. Such types of preparations can be and would be detected.
But back to BTWC, Article IX: between 1975 (EIF for the BTWC) and 1993 (Opening for signature of the CWC) we witnessed an accelerated CW armament competition between the US and the USSR (including the startup of the US binary production programme), the start of Iraq’s CW programme culminating in gas being used in the 1980-88 Gulf War; Libya’s CW programme, Syria’s, …
So, as far as the analogy with Dan’s argument goes (I am discussing 2 different weapon categories mentioned in a single treaty): each party to the BTWC, whether a possessor or non-possessor of CW was bound to negotiate the CWC, but it did not prevent several among them to develop, produce, or even use CW during the intervening period.