(1) Any person aggrieved by an order made under section 13 or sub-section (4) of section 14 or section 17 of this Act may prefer an appeal to Director General of the Bureau within such period as prescribed.
     (2) No appeal shall be admitted if it is preferred after the expiry of the period prescribed therefor:
     Provided that an appeal may be admitted after the expiry of the period prescribed therefor if the appellant satisfies the Director General that he had sufficient cause for not preferring the appeal within the prescribed period.
     (3) Every appeal made under this section shall be made in such form and shall be accompanied by a copy of the order appealed against and by such fees as may be prescribed.
     (4) The procedure for disposing of an appeal shall be such as may be prescribed:
     Provided that before disposing of an appeal, the appellant shall be given a reasonable opportunity of being heard.
     (5) The Director General may suo motu or on an application made in the manner prescribed review the order passed by any officer to whom the power has been delegated by him.
     (6) Any person aggrieved by an order made under sub-section (1) or sub-section (5) may prefer an appeal to the Central Government having administrative control of the Bureau within such period as may be prescribed.