Again, it's asking the railroads what their plans are, as is done in the U.S. The Surface Transportation Board asks the class 1 railways to set out their plans for the upcoming year. Again, it's having an idea system-wide—and this goes back to Mr. Masterson's point, too—of all of the players that depend on the rail supply chain. What is the actual availability of rail capacity at a given point in time? It's not an easy question, but you need data.
On September 13th, 2017. See this statement in context.