It would have to be based in legislation because, as you know, crown corporations operate at arm's length from the government, so the current legislative framework is that the Treasury Board administrative policy does not apply to them. There are different ways you could do that. You could alter legislation, obviously. You can use an order in council and direct the crown corps for a specific thing that you want them to do.
There are also less formal ways. You could use a ministerial letter: the President of the Treasury Board could write to all his ministerial colleagues for something specific and say, “I encourage you, as ministers responsible for crown corporations, to enact or ask your crown corporations to follow the spirit and intent of this particular policy initiative.” We have some levers with crowns, and there are different ways you can do that.