law: Industrial Disputes Act, 1947
  9. Finality of orders constituting
  
  Boards, etc.
  (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 Labor 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.
  (2) No settlement arrived at in the course of a conciliation
  
  proceeding shall be invalid by reason only of the fact that such settlement was
  
  arrived at after the expiry of the period referred to in sub-section (6) of
  
  section 12 or sub-section (5) of section 13, as the case may be.
  (3) Where the report of any settlement arrived at in the course
  
  of conciliation proceeding before a Board is signed by the Chairman and all the
  
  other members of the Board, no such settlement shall be invalid by reason only
  
  of the casual or unforeseen absence of any of the members (including the
  
  Chairman) of the Board during any stage of the proceeding.]