The directive is contained in tab 2 of your reference material. It's the actual copy of the directive that is in force and remains in force on Transport Canada's website. It was made effective December 16, 2005. My understanding is that it is still in force and effect. It specifically says that it will apply to all civil aviation functions responsible for oversight or certification of the aviation industry, as well as those responsible for enforcement and investigation of regulatory contraventions.
As to the issue of who was advised internally within the department to approve this document and issue it, I have no knowledge whatsoever of that, because I don't work in the department and I can only speak to what I see, as a published document, from the department.