S. 151: Reassessment-Sanction for issue of notice-Specified authority-Approval granted by the Principal Commissioner was not valid; consequently, the order passed under section 148A(d) and consequential notice issued under section 148 were held to be bad in law and were quashed and set aside. [S. 148,148A(b), 148A(d), 151(ii), TOLA, Art.226]