This is a piece of legislation that is trying to set out general principles. Since we are locating the conversation in the language of the United Nations Framework Convention on Climate Change, within that conversation there are assumptions about responsibility and about the historical record and about the per capita. That is part of the whole discussion about the United Nations Framework Convention. That's part of the whole discussion about Kyoto. Why is it that we have common but differentiated responsibilities? That is based on those principles.
By referencing it through the UNFCCC and through the Kyoto Protocol, we are assuming the logic of that conversation, which is going to guide us and which gets into things like per capita and historical record and ability to pay and common but differentiated. All of that is implicit when you reference it. There is no need to spell it out again, because once you have referenced it, you have said that.