For 40 years or so laws granting regulatory authority to federal agencies were written with the understanding that Chevron Deference was the law of the land. Now those laws grating regulatory authority are going to be considered too vague. What will happen is that regulatory agencies will be thwarted in their duty to protect the public. Where the court is headed is that they will require a level of specificity in writing laws that grant regulatory authority that is impractical. Read what the dissenting opinions were and see where they think things are headed.