Research association approval under section 35(1)(ii) requires separate research accounts and annual scientific returns. Approval of Medical Research Foundation, Madras as a Scientific Research Association is notified under the Income-tax Act, subject to maintaining a separate account for sums received for medical scientific research and furnishing annual returns of scientific research activities to the Indian Council of Medical Research in the prescribed form by the specified annual date; the recognition is effective for the two-year period from 18-5-1978 to 17-5-1980.