Tax exemption notification under section 10(23C)(iv): institution designated for exemption for the referenced assessment year. The Central Government, invoking clause (iv) of sub-section (23C) of section 10 of the Income-tax Act, 1961, notifies the Indian Standard Institution as recognised for the purposes of that exemption provision for the assessment year 1981-82, recorded by notification number S.O.1894 dated 28-5-1981.