Notification under section 10(23C)(iv) recognizes a charitable trust's tax-exempt status for specified assessment years. Notification under section 10(23C)(iv) designates Navajbhai Ratan Tata Trust, Bombay as qualifying for tax-exempt status under that sub-clause, with the Central Government applying this recognition for specified assessment years and identifying the trust and assessment-year coverage as the operative parameters of the exemption.