Very quickly, Sable Island is a very special place for Nova Scotians. It's a sliver of sand in the ocean that Nova Scotians care very deeply about. I think most Nova Scotians want to protect it, and for the most part want it to be left alone.
That said, all around Sable Island there are oil and gas exploration opportunities, and that is occurring right now. The issue with the national park was whether this sliver of sand would be closed to oil and gas exploration while the rest of the area around it remains open. At the time that the legislation was being debated and discussed, CPAWS proposed a number of amendments that would have made it very clear that Sable Island is off limits to oil and gas exploration.
With regard to the provincial government, the offshore accord implementation act is a piece of mirror legislation, so it's both federal and provincial, and my understanding is that changes to that would require both levels of government to agree.