Right. Plenty of operations will not have a wye, and you'll have to run the engine backwards. You need to sometimes.
At the beginning, I talked about use of LVVR only on main lines; it's what we talked about from the beginning. What is your definition of the main line for this purpose? If you have an operation—like there's a railway in the northeastern U.S. that runs a whole track basically on rule 105. It's all very slow, basically yard limit rules. Would that company be required to have this, if it were in Canada, in your view? Is that a main line for your purposes?