I mean, again, this is all new because it's all very recent within the last year. The CITT may decide that it has the ability to dive deeper, or it may not. If it doesn't and if it's only going to look at whether there is legitimate reason shown in the actual national security exception—whether that's actually legitimate is a separate question—then perhaps that would be the way to do it.
On May 2nd, 2017. See this statement in context.