Here’s an ACT interview with Adam Scheinman.
I’m sure that others have delved into the US position concerning past REVCON commitments. This is what he said on the matter:
ACT: In 2010 the review conference agreed to an action plan on all three pillars of the treaty, including Article VI. Does the administration recognize those past commitments as still valid? Will it seek to update those goals, particularly Article VI, through the consensus document?
Scheinman: I think this issue of past commitments, which is talked about quite a bit, is a bit of a red herring. It’s important to understand that only the terms of the treaty are legally binding on states-parties and that any commitment recorded at review conferences in a consensus document are political. They reflect what seems achievable or desirable at the time they were made. Now, it’s certainly the case that many of the actions in review conference final documents remain relevant and certainly important. Others are past their shelf life. There’s a call in previous documents for fully implementing the ABM [Anti-Ballistic Missile] Treaty, which hasn’t been in force for two decades now. Other actions are important, but were the product of the time, when conditions for action were more favorable.
That’s certainly the case in terms of U.S.-Russian arms control opportunities in the early post-Cold War period and also in connection with the Oslo Middle East peace process in the mid-1990s. What I will say is that we remain firm in our support for legal undertakings in the NPT, as I hope all parties are, and in our support for realistic arms control and disarmament measures. We also recognize the political importance of implementing commitments made in past documents. But security conditions change in unpredictable ways, and so it’s probably more productive if we take a forward-looking approach and not lose time debating the history.