I think there is only one country in the world that has advance directives in its law. Despite the fact that there are many countries that allow for medical assistance in dying, only one country has moved on this. It goes to show you how careful many countries in the world are with respect to advance directives. It think it's incumbent upon us to move slowly on this to make sure we get it right.
On May 9th, 2016. See this statement in context.