Income Tax Act, 1961
Section 158B. DEFINITIONS.
In this Chapter, unless the context otherwise requires, – (a) “Block period” means the previous years relevant to ten assessment years preceding the previous year in which the search was conducted under section 132 or any requisition was made under section 132A, and includes, in the previous year in which such search was conducted or requisition made, the period up to the date of the commencement of such search or, as the case may be, the date of such requisition;
(b) “Undisclosed income” includes any money, bullion, jewellery or other valuable article or thing or any income based on any entry in the books of account or other documents or transactions, where such money, bullion, jewellery, valuable article, thing, entry in the books of account or other document or transaction represents wholly or partly income or property which has not been or would not have been disclosed for the purposes of this Act.
