I know you have put your question to Environment Canada but I will try to answer.
Those are good questions which should be put to the National Energy Board, which has those responsibilities. It depends if you are referring to an offshore project or a land project, since the regimes are different. In the case of an offshore project, regulation is it strictly federal, but there are still Aboriginal rights that have to be recognized. If it is on land, it depends again. Is it on land covered by Aboriginal rights or is it on Crown land? One has to be very precise.