Notification under section 10(23C)(iv) accords notified tax-exempt status to a literary society for the relevant assessment year. The Central Government, by Notification No. S.O.2021 dated 24-4-1989, notifies Bangiya Sahitya Parishad, Calcutta, under section 10(23C)(iv) of the Income-tax Act for the purpose of that sub-clause for the specified assessment year, exercising the statutory power to confer notified institutional status for tax treatment.