text:  for the last 40 years. There is some debate about sort of the actual impact of Loper Bright, which is the case that overruled Chevron, because there are other deference doctrines in place. But I think it's important for the listeners to understand just a couple of quick things. One is that agencies act only as instructed by Congress. So there is always a law passed by Congress, not by the agency, that controls the scope of their activities.