Thanks, it had some interesting points. The person who sent it to me is not a lawyer. I should make them check to see if it is a current version.
Ex post facto law
An ex post facto law (from Latin: ex postfacto, lit.ā'out of the aftermath') is a law that retroactively changes the legal consequences (or status) of actions that were committed, or relationships that existed, before the enactment of the law. In criminal law, it may criminalize actions that were legal when committed; it may aggravate a crime by bringing it into a more severe category than it was in when it was committed; it may change the punishment prescribed for a crime, as by adding new penal...