Section 113 of Income Tax Act "Tax in the case of block assessment of search cases"
The total undisclosed income of the block period,
determined under section 158BC, shall be chargeable to tax
at the rate of sixty per cent:
Provided that the tax chargeable under this section shall be
increased by a surcharge, if any, levied by any Central Act
and applicable in the assessment year relevant to the
previous year in which the search is initiated under section
132 or the requisition is made under section 132A..
Section 115-I. A non-resident Indian may elect not to be governed by the provisions of this Chapter for any assessment year by furnishing his return of income for that assessment year under section 139 declaring therein that the provisions of this Chapter shall not apply to him for that assessment year and if he does so, the provisions of this Chapter shall not apply to him for that assessment year and his total income for that assessment year shall be computed and tax on such total income shall be charged in accordance with the other provisions of this Act.