We can use CEPA in many cases, but there are some limitations. For instance, if you wanted a trading regime to support the emissions reductions, there are some limitations in CEPA in terms of the kind of trading regime, particularly, that would relate to the best one for air particulate matter and that would harmonize with the United States.
There are other limitations in CEPA, such as, for instance, if you wanted to set a higher standard for new facilities versus existing facilities. So there are some technical limitations in terms of setting standards.
Then there are the equivalency provisions that Ms. Cobden mentioned. Under CEPA right now, one of the deterrents to having agreements with the provinces is that there's an automatic sunset every five years under the CEPA agreement, and that's just seen as being an administrative burden for no net gain.