That would be up to first nations. As governments, first nations would naturally want and need to get into new intergovernmental agreements. On the majority of the research I've seen where first nations have done it, once they have the authorities.... Actually, that's the basic problem. Once there, all the planning that I've seen in fact contemplated referential incorporation, if not by the federal government, then by the first nation itself, of the parts of the relevant regulatory regime that they didn't think they should do themselves. So it's complete harmonization.
On May 1st, 2012. See this statement in context.