Section 15T(3) in The Securities and Exchange Board of India Act, 1992
(3)Every appeal under sub-section (1) shall be filed within a period of forty-five days from the date on which a copy of the order made by the Board or the Adjudicating Officer, as the case may be, is received by him and it shall be in such form and be accompanied by such fee as may be prescribed :Provided that the Securities Appellate Tribunal may entertain an appeal after the expiry of the said period of forty-five days if it is satisfied that there was sufficient cause for not filing it within that period.