It is a joint centre for espionage, to be located in Moscow. Not any old espionage, but spying on the most fearsome weapons in history. For Russia and the United States to engage in this activity jointly is to give the strongest imaginable signal that the Cold War is over. Provided, of course, JDEC works. The signals coming from the radars and satellites of both parties must be available for analysis to the other, so that each can assess their truthfulness and dependability.
False data are dangerous.
This is so obvious that neither party would consent to engage in such an exchange without a high degree of transparency. Neither will end up with many secrets in regard to its missiles, but neither has many now, and they don't need them for deterrence. We have an unprecedented opportunity to prevent accidents arising from malfunctioning on either side, and from the current disrepair of Russia's warning systems. Such collaboration would be a far-fetched dream but for the fact that the dreamers are the Russian and U.S. presidents, who have committed themselves to establishing this joint missile warning centre within a year. The two parties can be expected to notify one another, in advance and in detail, of rocket launches, since they will jointly be observing them.