Correct. It was incorporated into the 1985 farm bill by the U.S. Congress. At the same time, in Canada we began our North American waterfowl management plan. There was a natural experiment of sorts north and south of the border, and the Americans won hands down on this. They invested heavily in conservation and they saw a dramatic increase in production of wildlife from south of the border, while we were going in the opposite direction.
On May 2nd, 2013. See this statement in context.