S. 151: Reassessment – Sanction for issue of notice -Validity of unsigned approval- The approval under section 151 dated 30-3-2021 was unsigned, the Assessing Officer had no valid jurisdiction to issue the notice under section 148; consequently, the notice under section 148 and all consequential proceedings were quashed- The Court also held that section 292BC, being applicable retrospectively from 1-4-2021, had no application to the approval granted on 30-3-2021. [ S. 148 , 282A(2), 292BC , Art . 226 ]