I have a couple of points with regard to that.
First of all, we believe that rail is part of the climate change solution. Our emissions are about 75% less than moving freight by truck. One train is the equivalent of getting roughly 300 trucks off the road. We'd like to see policies that incentivize moving more freight by rail because that's part of the climate change solution.
Specifically on carbon taxes, if we're talking about grain, grain products are regulated. Our total revenue is capped in Canada for the movement of just those commodities. Part of the calculation that the agency does every year to determine the overall cap for CPKC and CN looks at changes in fuel costs.
The MRE is a cap, but part of the formula used to determine it is what they call the VRCPI, the volume-related composite price index. It's essentially an inflation calculation. One of the inputs that the agency looks at in determining that calculation each year is changes in fuel cost, including all taxes.