It's not an agreement, first of all. It's not a legal document; it's an arrangement. The minister, as I recall--things may have changed, I've been out for a while--was always very aware of memoranda of understanding that were signed. They're not exactly legal, but they're stronger than an arrangement. An agreement is more like having treaty status, I think. The international lawyers can correct me on that.
On April 14th, 2010. See this statement in context.