So Congress passed a law. A state Supreme Court interpreted the law. And then a Federal Regulator, tasked with devising rules to implement the law, decided that the court got it wrong and just writes a new rule? That's not really how it's supposed to work. If the Oregon state Supreme Court actually "got it wrong" then SCOTUS or Congress can correct it, not the FCC.
Now maybe Congress shouldn’t be allowed to delegate it’s powers, but that ship has long past sailed.