The following editorial was written by Bloomberg Opinion:
Among the many rulings the Supreme Court handed down this term, a decision on so-called Chevron deference could prove especially consequential. The question at issue was whether the courts or government agencies should determine the meaning of ambiguous laws. The new ruling unsettles a 40-year-old understanding by shifting some of the power over these choices away from the executive branch. Many regulatory actions may now face litigation.
Chevron deference matters more than it should because Congress insists on passing so many ambiguous statutes. Lawmakers do this partly by accident, failing to think through how new regulations will work, and partly by design, settling on muddled directives as a way to build coalitions and satisfy rival constituencies. In either case, their failure leaves the other branches of government to work out what the laws in question actually mean.
Under the now-discarded Chevron doctrine, courts usually deferred to the wisdom of regulatory agencies — with good reason. Officials at the Environmental Protection Agency, for example, know a lot more about how to regulate pollution than do lawyers and judges. The problem is that the relevant statutes give the agencies such wide leeway that they can sometimes act as de facto lawmakers. Under Chevron deference, the agencies weren’t required to show that their interpretation of the law was correct, or the best or most plausible interpretation — only that it was “reasonable.” Over time, agencies have become adept at widening this discretion and expanding what conservatives often deride as the administrative state.
So it’s no surprise that the court’s conservative majority has overthrown the Chevron understanding — or that the liberal minority objected in such strident terms.