As the national archivist will tell you, there is no document that is always sensitive at all times and in all circumstances, including solicitor-client privilege.
I had a discussion with him about this, and he was talking about how he went to the Law Society of Upper Canada and worked out an agreement with them that documentation that's covered by solicitor-client privilege would no longer need to be protected from public disclosure by the archives after x number of years, the argument being that even solicitor-client privilege loses sensitivity after the passage of time.
We have in the Government of Canada, for example, 50- or 100-year-old legal opinions paid for by the taxpayer, and at some point they can be released because there would be no injury from releasing, and that's the part two. If there's injury because there's ongoing litigation or the matter is still in dispute, and so forth, those are injuries that can be demonstrated to the Crown's interest. The point of part two is trying to have a mechanism where the old legal opinions that are dated and stale can come into the public domain.