The short answer is that I don't know, because the review has not been completed in this case. But if I can try to be a little more helpful, deputy ministers are responsible for setting out the procedures for handling documents in their departments, but the ministers are also responsible for things that are within their office. In this case, we have a former minister who took responsibility for the fact that an error was made, and he has resigned.
On June 17th, 2008. See this statement in context.