Section 18(2) in The Haryana Ceiling of Land Holdings Act, 1972
(2)Any person aggrieved by a decision or order of the Collector (whether acting as prescribed authority or not) not being a decision or order made in an appeal under sub-section (1), may, within [fifteen days] from the date of the decision or order, prefer an appeal to the Commissioner in such form and manner as may be prescribed :Provided that the Commissioner may entertain the appeal after the expiry of the said period of [fifteen days] if he is satisfied that the appellant was prevented by sufficient cause from filing the appeal in time.