As a starting point, the B.C. system was used as a basis for a model to develop the GGPPA. The other thing I would note on the GGPPA and the general approach by the federal government with respect to climate change is that there is obviously a recognition that, in the economy, there are sectors and businesses, such as farming, that are more sensitive to a fuel charge, for instance, because they are trade exposed, and maybe also because they don't have lots of opportunities and technologies available.
If you look at the way it's done, whether through the OBPS or through very specific exemptions, you see that the general approach used is basically for these sectors to try to reduce the overall incidence of the carbon pricing so that it is easier, over time, for the industry to absorb it. It's not so much—