Antonin Scalia dissented, saying that the court gives EPA and other agencies the authority to say what their rules mean “for no good reason.”
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That’s a head slapper for me.
Scalia’s dissent is absolutely scathing in its criticism of the government. He knew that his vote wasn’t necessary to the outcome of the case, so he took the opportunity to point out how absurd the Court’s practice of giving defference to an administrative agency’s interpretation of its own authority is.