At this time, former president Duvalier is under a prevent-departure notice. The committing magistrate has personally asked him to not travel without his authorization, but no written order has been issued. However, according to Haitian law, if there is no written order, there is no decision. A prevent-departure notice has been issued, so he cannot leave the country, but he can travel within it. He's actually done just that recently.
On March 7th, 2011. See this statement in context.