I would refer you to the document we issued, the “Pan-Canadian Approach to Pricing Carbon Pollution”, which articulates a pretty clear set of criteria. We followed up that document with two further guidance documents, which are public and on the website. I can provide those to the committee. There are now three very detailed documents that provide criteria that attempt to provide jurisdictions with the flexibility to design their own system, while meeting some common, basic criteria.
The fourth thing we've done is that the deputy minister of Environment and Climate Change wrote a letter last week to each of his colleagues specifying the kind of information that we want to see from provinces in their description of their system, to enable us to determine whether their systems are aligned with that federal standard.