To answer your second question, the fact that the Inuit have occupied the land since time immemorial is an important consideration, but it's not connected to the issue of the establishment of the outer limits of the shelf. Nevertheless, it is a major consideration and could prove extremely important for consolidating Canada's rights, specifically its sovereignty over the coastal waters delimited in 1985. Norway took similar action when it determined in 1951 that Norwegian fishers had exclusive fishing rights over two of the country's bodies of water.
On May 13th, 2009. See this statement in context.