S. 148A: Reassessment-Conducting inquiry; providing opportunity before issue of notice-Faceless assessment-Initial notice and order-Pending appeal before Commissioner (Appeals) and revision application before Principal Chief Commissioner-Stay of assessment order until outcome of appellate proceedings and revisional application-All contentions of assessee kept open for raising before statutory authorities. [S. 144, 144B, 147, 148, 148A(b), 148A(d), 250, 253; Art. 226]