Section 158B of Income Tax Act "Definitions"
Section 158B. In this Chapter, unless the context otherwise requires,-
(a) "block period" means the period comprising previous years relevant to six assessment years preceding the previous year in which the search was conducted under section 132 or any requisition was made under section 132A and also includes the period up to the date of the commencement of such search or date of such requisition in the previous year in which the said search was conducted or requisition was made :
Provided that where the search is initiated or the requisition is made before the 1st day of June, 2001, the provisions of this clause shall have effect as if for the words "six assessment years", the words "ten assessment years" had been substituted;
(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, or any expense, deduction or allowance claimed under this Act which is found to be false.
Section 158BA of Income Tax Act "Assessment of undisclosed income as a result of search"
Section 158BA. (1) Notwithstanding anything contained in any other provisions of this Act, where after the 30th day of June, 1995 a search is initiated under section 132 or books of account, other documents or any assets are requisitioned under section 132A in the case of any person, then, the Assessing Officer shall proceed to assess the undisclosed income in accordance with the provisions of this Chapter.
(2) The total undisclosed income relating to the block period shall be charged to tax, at the rate specified in section 113, as income of the block period irrespective of the previous year or years to which such income relates and irrespective of the fact whether regular assessment for any one or more of the relevant assessment years is pending or not.
Explanation.-For the removal of doubts, it is hereby declared that-
(a) the assessment made under this Chapter shall be in addition to the regular assessment in respect of each previous year included in the block period;
(b) the total undisclosed income relating to the block period shall not include the income assessed in any regular assessment as income of such block period;
(c) the income assessed in this Chapter shall not be included in the regular assessment of any previous year included in the block period.
(3) Where the assessee proves to the satisfaction of the Assessing Officer that any part of income referred to in sub-section (1) relates to an assessment year for which the previous year has not ended or the date of filing the return of income under sub-section (1) of section 139 for any previous year has not expired, and such income or the transactions relating to such income are recorded on or before the date of the search or requisition in the books of account or other documents maintained in the normal course relating to such previous years, the said income shall not be included in the block period.
What is the Authority competent to make the block assessment? What is Application of other provisions of this Act? What is the Chapter not to apply after certain date? Section 158BG, 158BH and 158BI of Income Tax Act 1961