The issue has such far-reaching consequences that it will be probably decades in settling out. The Chevron Deference Doctrine allowed the Executive branch of the U.S. Government to make rules and laws and definitions and interpretations without the action of the Legislative branch, and it ALSO tied the hands of the Judicial branch by requiring judicial deference to the non-legislated rulings.
In essence, it gutted a key clause in the U.S. Constitution relating to "separation of powers" - which is an incredibly important part of the original "checks and balances" built into the government. The simple concept is that the legislative branch creates/passes a law, the executive branch enforces it, and where there is a problem, the judicial branch addresses it. But under Chevron Deference, the executive branch would not rely on Congress and the courts were required to agree with them.
For 40 years it has been the ability of the Executive branch to make new rules essentially by fiat... "Let it be that..." I'll have to eventually look at the decision in depth to see if there is a remedy for the damage already done in the last 40 years. However, when you hear / see discussions of "the deep state" - this is the heart of that discussion. The deep state refers to the ability of the bureaucracy to make up rules as they go, unchecked by Congress or the courts. But now, that ain't gonna happen the same way.
