If they are operating a website the attack on your reputation is written making it libel. Second, you would have to serve them with a cease and desist letter once Muni is final.They would be afforded a reasonable amount of time to take the information down.
However, I do not believe we could sue for libel because the one defense to a libel claim is the truth. In other words, if the words they wrote about you is true, there is no damage. If they wrote you are still on the registry AFTER you are removed then that would be different.
In my opinion, As long as what they are saying is true, and the information is public information, there is no libel.