S. 148A : Reassessment-Conducting inquiry, providing opportunity before issue of notice-Settlement Commission-Settlement of cases-Reassessment-Order passed by way of settlement of case is conclusive-Order cannot be reopened except in case of fraud or misrepresentation-Issues considered by Settlement Commission-Re assessment notice is not valid. [S. 147, 148,148A(b), 148A(d), 245D(4), 245D(6), 245D(7), 245H, 245I, Art. 226]