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Constitution,to create other federal courts.Courts established under Arti-cle III are known as constitutional courts and those created under Article I are called legislative courts.The Supreme Court,courts ofappeals,and federal district courts are constitu-tional courts.Legislative courts include the U.S.Court ofMilitary Ap-peals,the United States Tax Court,and the Court ofVeterans Appeals.
Legislative courts,unlike their constitutional counterparts,often have administrative and quasi-legislative as well as judicial duties.Another differ-ence is that legislative courts are often created for the express purpose of helping to administer a specific con-gressional statute.Constitutional courts,on the other hand,are tribunals established to handle litigation.
Finally,the constitutional and leg-islative courts vary in their degree of independence from the other two branches ofgovernment.Article III(constitutional court) judges serve during a period ofgood behavior,or what amounts to life tenure.Because Article I (legislative court) judges have no constitutional guarantee of good-behavior tenure,Congress may set specific terms ofoffice for them.In sum,the constitutional courts have a greater degree ofindependence from the other two branches ofgovernment than the legislative courts.