S. 254(1) : Appellate Tribunal–Duties–Tribunal failed to act as last fact finding authority-It failed to discharge its duty and function expected of it by law-Tribunal set aside the matter to AO-Court held that Tribunal could have summoned all records and thereafter should have arrived at categorical conclusion whether First Appellate Authority was right or AO-This having admittedly not been done, court was of firm opinion that Tribunal failed to act as last fact finding authority—It failed to discharge it duties– Matter remanded to Tribunal—DTAA- India–Netherlands. [Art. 5(5)]