(1) Any person aggrieved by any direction of the National Authority issued under section 10 of the Act, may, within a period of thirty days from the receipt of such direction, prefer an appeal to the Central Government.
(2) No appeal shall be admitted by the Central Government if it is preferred after the expiry of the period specified under sub-rule (1):
Provided that an appeal may be admitted after the expiry of the period specified in sub-rule (1), if the appellant satisfies the Central Government that he had sufficient cause for not preferring the appeal within the said specified period.