TDS on investment fund unit income: withholding required on distributions to unitholders, with higher withholding for non-residents. Tax deduction applies to distributions by a business trust to unitholders of specified investment-fund income, withheld at the time of credit or payment. Resident, non-resident and foreign corporate recipients are subject to differing withholding intensities; lower-rate certificates do not apply, and failure to furnish a PAN invokes the PAN-related higher withholding rule. No withholding is required on amounts not chargeable to tax for non-resident or foreign corporate recipients.