A State Department official said Sunday that treaty nations had not yet received notice of the Russian request, but that certification of the Russian plane with a "digital electro-optical sensor" could not occur until this summer because the treaty requires a 120-day advance notification. The official spoke on condition of anonymity because he wasn't authorized to discuss the issue publicly.
The official also said that the treaty, which was entered into force in 2002, establishes procedures for certifying digital sensors to confirm that they are compliant with treaty requirements. The official said all signatories to the treaty agree that "transition from film cameras to digital sensors is required for the long-term viability of the treaty."
In December, Rose Gottemoeller, undersecretary of state for arms control and international security, sought to temper concerns about Russian overflights, saying that what Moscow gains from the observation flights is "incremental" to what they collect through other means.