Exclusion of certain aliens from the United States, primarily senior officials or major stock holders, and their families, of companies that do business in Cuba on property expropriated from American citizens. To date, executives from Italy, Mexico, Canada, Israel, and the United Kingdom have been barred. Provides power to the Legislative Branch to override an Executive Branch cancellation of the embargo, although such a legislative veto had been ruled unconstitutional by the Supreme Court 13 years earlier.