S. 148A: Reassessment-Conducting inquiry, providing opportunity before issue of notice-Limitation-Initial notice issued within limitation period-Subsequent order and notice for reopening assessment issued based on assessee’s reply to initial notice-Held, Notice not barred by limitation-Notice and reassessment proceedings valid. [S. 147, 148, 148A(b),148A(d), 149(1)(a), Art. 226]