S. 263 : Commissioner-Revision of orders prejudicial to revenue-Lack of enquiry-Contribution to Provident fund and ESI-Justified in setting aside the order-Incentive payments-Commission-Tax deduction at source-Not justified in revising the order-Exempt income-Debatable issue-Revision order is set aside. [S. 14A, 36(1) (v), 139(1), 192, 194H]