It would be more correct to say that they have officially interpreted a current law (the Telephone Consumer Protection Act) to clarify that AI-Generated voices in robocalls violate that law, which seems reasonable.
Is this a humorous reference? Or is this supposed to be notable for some reason?
With enough evidence, operators are compelled to provide data and are given an opportunity to correct their action. If they refuse, FCC will eventually issue an order to all other providers to not accept calls from the bad actor.