(1)No order of the appropriate Government or of the Central Government appointing any person as the Chairman or any other member of a Board or Court or as the presiding officer of a Labour Court, Tribunal or National Tribunal shall be called in question in any manner; and no act or proceeding before any Board or Court shall be called in question in any manner on the ground merely of the existence of any vacancy in, or defect in the constitution of, such Board or Court.
