S. 148A : Reassessment-Conducting inquiry, providing opportunity before issue of notice-Survey-Salary or professional income-Remuneration is not taxable as salary-Remuneration of Doctors working in hospital-Issue of notice without examining the contracts between hospital and doctors-Order and notice not valid. [S. 133A, 147, 148, 148A(d), 149A(d), 192, Art. 226]