Notification under section 10(23C)(iv) designates Bengal Social Service League for the section's applicability over specified assessment years. Central Government, under clause (iv) of sub section (23C) of section 10 of the Income tax Act, 1961, notifies Bengal Social Service League, Calcutta for the purpose of that provision for the assessment years 1981 82 to 1983 84 by Notification No. S.O.810 dated 5 3 1984.