Research expenditure deduction: enhanced relief for payments to approved research companies, subject to prescribed registration and approval conditions. Amendment to section 35 inserts clause (iia) providing an enhanced deduction equal to one and one fourth times sums paid to a company for scientific research, conditional on the company being registered in India, having main object of research and development, being approved by the prescribed authority in the prescribed manner, and meeting other prescribed conditions; a related insertion denies that deduction to a company approved under the approval requirement of clause (iia) for expenditure incurred after 31st March, 2008.