S. 148A: Reassessment – Conducting inquiry, providing opportunity before issue of notice Principle of Natural Justice – Non-Application of Mind by Authorities- Role of Principal Commissioner of Income Tax (PCIT) – Approval under Section 151- Strictures -Interplay Between CGST Act and Income Tax Act- Costs and Accountability of Tax Authorities- The High Court held that the reopening of assessment under Section 148 was invalid as it was based on mechanical approval and a lack of due diligence by the tax authorities- Imposed personal costs of ₹25,000 each on the Assessing Officer and the Principal Commissioner of Income Tax, payable to the National Association for the Blind, Mumbai for arbitrary and unjustified actions serves as a deterrent against abuse of authority and reinforces accountability in the exercise of statutory powers- Directed the Ministry to scrutinize the conduct of the involved officers for accountability. [S. 148 , 148A(b) 148A(d), 151 , Art. 226 ]