First of all, I'm going to remind everybody that the clause begins with “may”—“The Governor in Council may”—so there's no obligation on the Governor in Council to take a territorial approach. I'm also going to suggest that when it comes time to vote on the amendment, I would put forward a subamendment—just to give everybody a heads-up here—that would mean paragraph (a.1) would begin: “Within the limits of federal constitutional authority” and then “limiting the amount of greenhouse gases”, etc. Simply for greater certainty, I'm proposing that as a subamendment.
On December 7th, 2006. See this statement in context.