You have to be aware of the actions that the NSA has taken previously, the statements they make, and how their words don't match up with reality.
So, I'm quite sure that if they say that they're not allowed to request info from an ally, they are telling a very sanitized version of the truth. They in fact don't request such info from an ally.
What they don't say is that if an ally just happens to give them that info, they can't have it
They're not asking for anything