Search-based assessment jurisdiction governs treatment of unexplained investments when records are absent, shifting the burden of proof to the assessee.
Assessment based on search-derived incriminating material applies when jurisdiction under search-based assessment is not contested, and unexplained investments are taxed depending on whether amounts are recorded in books of account. The assessee bears the onus to explain investments; absence of records, non-filing of returns and non-cooperation justify adverse inferences. Procedural elements such as delay condonation, set-aside orders and cooperation in reassessment affect the assessment process, while interest for non-furnishing of returns is tied to the timing of the regular assessment.