Sunset Chevron Act

HR 8889, the Sunset Chevron Act, requires the Government Accountability Office (GAO) to compile a list of federal court decisions that upheld agency rules using Chevron deference (a legal doctrine where courts defer to agency interpretations of laws) and are still in effect. The GAO must organize this list by agency and assign each rule a sunset date - 30 days after the list's publication for the most recent rule, with older rules getting sunsets 30 days apart. This bill directly affects federal agencies whose rules are included in the GAO's list, as it triggers automatic expiration of those rules after specific dates. The key mechanism is the mandatory GAO review and the automatic sunset schedule, not new regulations or policy changes. The bill does not alter Chevron deference itself but creates a timeline for existing rules upheld under it to expire.