S. 263 : Commissioner-Revision of orders prejudicial to revenue-Interest income business or other sources-Decides the issue on merits and leaves no scope for enquiry by the Assessing Officer-Expenditure on earning interest income-Order of Tribunal and Revision is set aside-Directed the Assessing Officer to decide in accordance with law. [S. 28(i), 56, 57, 254 (1), 260A]