law: The Black Money (Undisclosed Foreign Income and Assets) and Imposition of Tax Act, 2015
  Chapter II
  Basis of Charge
  3. Charge of tax.-
  (1) There shall be charged on every assessee for every assessment year commencing on or after the 1st day of April, 2016, subject to the provisions of this Act, a tax in respect of his total undisclosed foreign income and asset of the previous year at the rate of thirty per cent. of such undisclosed income and asset:
  Provided that an undisclosed asset located outside India shall be charged to tax on its value in the previous year in which such asset comes to the notice of the Assessing Officer.
  (2) For the purposes of this section, "value of an undisclosed asset" means the fair market value of an asset (including financial interest in any entity) determined in such manner as may be prescribed.