law: The Black Money (Undisclosed Foreign Income and Assets) and Imposition of Tax Act, 2015
  27. Amendment of assessment on appeal.-
  Where as a result of an appeal under section 15 or section 18, any change is made in the assessment of a body of individuals or an association of persons or an order for new assessment of a body of individuals or an association of persons is made, the Commissioner (Appeals) or the Appellate Tribunal, as the case may be, shall pass an order authorising the Assessing Officer either to amend the assessment made or make a fresh assessment on any member of the body or association.