Tax exemption notification under section 10(23C)(iv) recognizes a charitable society for specified assessment years for income tax. Central Government notification recognizes the Society of the Helpers of Mary, Bombay, as entitled to tax-exempt status under section 10(23C)(iv) of the Income-tax Act, applying that recognition for the assessment years 1981-82 to 1984-85 and thereby fixing the temporal scope of the society's exemption for income-tax purposes.