It is not enshrined. That's the problem. The crown prerogative is not enshrined in law. It is a convention of our constitution.
What I found surprising.... I think it's worthwhile, if you want more detail here, to go back and read the 2010 Supreme Court decision. This involved Omar Khadr, by the way. The Khadr family, I think, has provided more progress in terms of the use of our laws than almost any other family in the history of this country. In that particular decision, the Supreme Court said that his rights had been abused by CSIS's going down to interview him. At the same time, the Supreme Court said that it could not instruct the government as to what it should do in order to assist Mr. Khadr and get him out.