(1) For the purposes of making an assessment or reassessment under this Act, the Assessing Officer may, on receipt of an information from an income-tax authority under the Income-tax Act or any other authority under any law for the time being in force or on coming of any information to his notice, serve on any person, a notice requiring him on a date to be specified to produce or cause to be produced such accounts or documents or evidence as the Assessing Officer may require for the purposes of this Act and may, from time to time, serve further notices requiring the production of such other accounts or documents or evidence as he may require.
(2) The Assessing Officer may make such inquiry, as he considers necessary, for the purpose of obtaining full information in respect of undisclosed foreign income and asset of any person for the relevant financial year or years.
(3) The Assessing Officer, after considering such accounts, documents or evidence, as he has obtained under sub-section (1), and after taking into account any relevant material which he has gathered under sub-section (2) and any other evidence produced by the assessee, shall by an order in writing, assess the undisclosed foreign income and asset and determine the sum payable by the assessee.
(4) If any person fails to comply with all the terms of the notice under sub-section (1), the Assessing Officer shall, after taking into account all the relevant material which he has gathered and after giving the assessee an opportunity of being heard, make the assessment of undisclosed foreign income and asset to the best of his judgment and determine the sum payable by the assessee.