(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.
