(3)The Assessing Officer shall, subject to fulfilment of the conditions specified in sub-section (1) and after the expiry of the period of filing the appeal as specified in clause (b) of sub-section (2) of section 249, grant immunity from imposition of penalty under section 270A and initiation of proceedings under section 276C or section 276CC, where the proceedings for penalty under section 270A has not been initiated under the circumstances referred to in sub-section (9) of the said section 270A.