Right now, it's up to the defence. Implied in that, of course, is that the accused or the offender is consenting to the information's being made known to the court. If the accused is not willing to provide that information in an interview or whatever with the probation officer, then it doesn't become available. Obviously there are confidentiality requirements or obligations for any professional to whom they might be asking questions.
Don't you think that the terminology in the Criminal Code saying “wherever possible” limits the obligation upon the probation officer to go beyond whatever the person is consenting to?