S. 148A: Reassessment-Conducting inquiry, providing opportunity before issue of notice-Sanction-Specified authority-Time limits-Surviving time-Effect of extension under 2020 Act-Approval of specified authority-Though approval under section 151(1) by Principal Commissioner for passing order under section 148A(d) and issuing notice under section 148 was valid, notices/orders issued beyond “surviving time” as explained in UOI v. Ashish Agarwal(2022) 444 ITR 1 (SC) were barred by limitation and liable to be quashed. [S. 147, 148, 148A(b), 148A(d), 149(1)(b), 151(1), Taxation and Other Laws (Relaxation and Amendment of Certain Provisions) Act, 2020, S. 3(1), Art. 226]