law: 23. Power of Central Government to issue directions to Board.-
  (1) In the discharge of its functions under this Act, the Board shall be bound by such directions on questions of policy as the Central Government may give to it from time to time:
  Provided that the Board shall be given an opportunity to express its views before any direction is given under this sub-section.
  (2) The decision of the Central Government whether a question is one of policy or not shall be final.