Section 55. Orders constituting Appellate Tribunal to be final and not to invalidate its proceedings

55. Orders constituting Appellate Tribunal to be final and not to invalidate its proceedings. -No order of the Central Government appointing any person as the[[1]] 2[Appellate Tribunal] shall be called in question in any manner and no act or proceeding before a 2[Appellate Tribunal] shall be called in question in any manner on the ground merely of any defect in the constitution of a[2] [Appellate Tribunal]. order of the Central Government appointing any person as the[[1]] [Chairperson or the Member] of a