That's a very good question.
Certainly, there's the Criminal Records Act that deals with pardons and things like that in Canada. When someone is convicted of a criminal offence, there's a public record of that. That's public knowledge. You can access it from a courthouse.
If a foreign government collects that sort of information at the source, or at some point obtains evidence that someone has been convicted of a crime, and keeps that information, the fact that we have issued a pardon here is not something we can force another country to take into account. We can enforce that legislation here in Canada, but we can't.... The United States is sovereign, and if it wants to retain information it has gathered, that's not something on which we've got any leverage.