Section 116A(2) in The Representation of the People Act, 1951
(2)Every appeal under this Chapter shall be preferred within a period of thirty days from the date of the order of the High Court under section 98 or section 99: Provided that the Supreme Court may entertain an appeal after the expiry of the said period of thirty days if it is satisfied that the appellant had sufficient cause for not preferring the appeal within such period.