With respect to emergency authorization, it is only there for the extenuating circumstances exigent. There would not be a requirement for the commissioner to review that. He or she would certainly be free to opine on that. NSIRA themselves would review it. That would inform the intelligence commissioner in terms of going forward with any other kind of ministerial authorization.
Ultimately, the only reason this was created—and this isn't an elegant way to put it—is as a hedge. For extenuating circumstances, in an emergency, if you cannot get the intelligence commissioner—the post might be vacant or the commissioner might not be available—you need to proceed quickly.