The principal applicant must request the notes, however if they are not in Canada, they can authorize someone who IS in Canada to do so. The person requesting the information has to be INSIDE Canada. If that person is NOT the applicant, then the applicant has to fillout and sign a release to allow the requestor to send in the request.
You need proof that you are in Canada, if it is the applicant who has applied outland who is requesting the info.
For example, my husband is the applicant, we applied outland through Buffalo, but he is now residing in Canada with me. He had to prove he's in Canada, so we sent in his visit record from his passport to prove that he is in Canada and is indeed requesting the information himself.
Hope that makes sense.