Punishment is not unconstitutional unless they apply it to a person after they have been convicted So in the Muniz case it only gives relief to people convicted before SORNA was effective 2012 People convicted after that were put on SORNA right away so they knew about it and its punishments People before they added the punishment see the difference Technically I think it goes by the date you commit the crime. There is other ways the whole reg can be challenged still but this was about ex post facto application of punishment.