Tax exemption for notified public statutory bodies' specified income and for certain chairman allowances; infrastructure debt funds covered. Amendments to section 10 omit the Explanation to clause (34) and insert exemptions: allowances or perquisites notified by the Government paid to a Chairman, retired Chairman, member or retired member of the Union Public Service Commission; specified income of bodies/authorities/boards/trusts/commissions established by statute or by government, not engaged in commercial activity and notified by the Government (with 'specified income' to be defined by notification); and income of infrastructure debt funds set up under prescribed guidelines and notified by the Government.