<P> To establish Post Offices and Post Roads; </P> <P> To promote the Progress of Science and useful Arts, by securing for limited Times to Authors and Inventors the exclusive Right to their respective Writings and Discoveries; </P> <P> To constitute Tribunals inferior to the supreme Court; </P> <P> To define and punish Piracies and Felonies committed on the high Seas, and Offenses against the Law of Nations; </P>

Congress has implied powers as well as enumerated powers