 Yes, and I appreciate your clarifying question, because I think sometimes it's been suggested that if we don't provide a waiver, we're preventing somebody from using ATI. Railroads are more than welcome to use this technology. We're just saying it's got to be used in combination with visual inspections. We think of it as a sort of belt and suspenders approach, enhancing the success of the human inspection regime with new capabilities that these technologies may be able to deliver. So we'll continue to work with