Approval under section 35(1)(ii) confirms institutional recognition for tax-purpose eligibility during the stated effective period. Approval under section 35(1)(ii) of the Income-tax Act recognizes the Indian Society of Agricultural Economics, Bombay as an approved institution by the Indian Council of Agricultural Research by notification S.O.2098 dated 18-6-1980, effective for two years from 1-4-1977 to 31-3-1980.