Sec.  1.340   Attendance of witness; disobedience.

   The attendance of witnesses and the production of documentary evidence may
   be required from any place in the United States at any designated place of
   hearing. In case of disobedience to a subpena, the Commission or any party
   to a proceeding before the Commission may invoke the aid of any court of the
   United States in requiring the attendance and testimony of witnesses and the
   production of documentary evidence.

Evidence