Tax exemption under Section 10(23C)(iv): Indian Economic Association notified as eligible for income-tax exemption from assessment year 1978-79. Notification under Section 10(23C)(iv) of the Income-tax Act: the Central Government notifies the Indian Economic Association as eligible for the income-tax exemption under that clause, effective for the assessment year 1978-79, pursuant to the exercise of powers conferred by the provision.