From a communications perspective, there would be two forms of communications. I would call them “formal” and “informal”.
On the formal side, it's some of the things that were mentioned by my colleague. Through the review of corporate plans, there are letters of expectations that are sent to the CEOs of all Crown corporations by ministers, which basically identify the expectations of the minister in terms of what the Crown corporations will do in terms of activities. Those would be the primary ones, or what I would call “formal”.
Of course, ministers are free to meet with the chair of the board of directors and/or the CEO of the Crown corporation to ensure that government policy and government direction are understood by the Crown corporation and that the Crown corporation is seeking to adjust its activities to be aligned with the overall government direction.