The question on my mind concerns the moment you gave me the same explanation, saying that all you want to know is whether or not the subscriber is receiving service. You told me that, at the beginning of the investigation, you just need grounds to suspect someone and that, based on that, you'll be able to continue your investigation.
Now, however, you're using the same argument to request an information production order. In my opinion, if you're requesting that type of order, it means you've progressed a bit further in the investigation. I'm not a police officer or a lawyer, but I can picture the situation. I agree with you. You've convinced me enough with your first argument.
Now, this is another tool for your investigation. It seems to me that you're exaggerating a bit when you say that you still just need to suspect someone, because you're at the beginning of an investigation. You're making the same arguments. You'll have to explain this to me, because I really want to understand.