Section 150 of the Income Tax Act

Income-tax assessment proceedings are administrative in nature, not civil disputes or judicial proceedings between contesting parties. Income-tax authorities act as administrative bodies to estimate income and assess tax, and the proper service of notice within the limitation period is foundational for reassessment jurisdiction.

Proceedings that have attained finality under existing law due to a bar of limitation cannot be reopened or revived unless a subsequent amended provision is explicitly given retrospective operation to upset such completed proceedings.

A charge-sheet need not contain a detailed analysis of evidence; the trial court forms its opinion on charges by considering the charge-sheet and all accompanying documents. The case also discusses the constitutional validity of placing the burden of proof on the accused, particularly in anti-corruption cases, in light of Article 21.

The Supreme Court clarified that an appellate authority's 'finding' must be essential for disposing of the appeal for the relevant assessment year, not an incidental observation about another year's income. Appellate authorities cannot issue directions on matters not directly arising in the appeal for the specific assessment year, especially regarding escaped income, which has separate statutory mechanisms.

Reassessment proceedings cannot be initiated based on a mere change of opinion by the Assessing Officer when the primary facts necessary for assessment are fully and truly disclosed. The assessee is not obligated to instruct the Income-tax Officer on questions of law, nor can reassessment commence if the AO drew a wrong legal inference from disclosed facts.

Jewellery found in possession, to the extent permitted by Instruction No. 1916 (which exempts up to 100 gms of gold for unmarried male members), cannot be treated as an undisclosed investment.

Section 148 notices can be issued at any time for assessments or reassessments made in consequence of or to give effect to any final finding, direction, or order of any higher authority.