Search assessment provisions under Sections 153A and 153C override ordinary reassessment time limits; asset-threshold verification required.
The judgment holds that search-triggered assessment provisions function as non-obstante clauses displacing ordinary reassessment time limits, distinguishes the enduring liability to tax from the temporal right to assess, prescribes that block periods are computed from the year of search (or date of receipt of seized records for non-searched persons), and treats the asset-represented income threshold as a mandatory, aggregable precondition requiring the assessing officer's recorded satisfaction.