S. 147 : Reassessment-Search in third party premises-Sale of land-Unexplained investment-Return was not filed-Reassessment notice issued after analysing voluminous material collected by revenue during search-Reassessment notice is held to be valid-Search undertaken prior to 1-6-2015-Argument that proceedings should have been initiated u/s. 153C and not under section 148 was not accepted. [S. 69A, 132, 133A, 148, 153C, Art. 226]