Tax withholding threshold for contractor payments revised; payer must deduct tax when annual aggregate exceeds the set limit. Amendment substitutes clause (i) of sub-section (3) of section 194C to provide that no tax need be deducted on any single sum paid to a contractor or sub-contractor not exceeding twenty thousand rupees, but where the aggregate of such sums paid during the financial year exceeds fifty thousand rupees the payer shall be liable to deduct income-tax under section 194C.