Sure, I'm happy to add to that one.
As you know the new DOT-111s, or as we've been referring to them, the 1232 cars, are the standard that's in place right now, that are being ordered. They're the newer standard. There is some discussion in the United States with the PHMSA, Pipeline and Hazardous Materials Safety Administration, for the U.S. government on looking at potentially increasing additional valves, bottom valves, and those types of things. That's in discussion and evaluation right now.
What would happen is if that does become a future standard, again there would be a need for transition because the ones that are in place right now, that are being ordered, will have a life of a certain period of time and are deemed and are being looked at right now as being safe. Of course we always evaluate making sure that this is the safest mode of where it's going, and that's why that is continuing to be evaluated.
It's an ongoing discussion. As new safer equipment comes into place, then of course the industry looks at that, looks at the retrofitability, and of course the new cars beyond that start being ordered in that mechanism. For example, many of the cars that I know are being ordered right now do take into account additional features above the 1232 standard that are available and are being ordered as part of that going forward, but it may not meet the entire scope of issues that are being discussed at PHMSA and with the Association of American Railroads right now.