Charitable institution notification under section 10(23C)(iv) recognizes All India Pingalwara Society's tax-exempt status for specified assessment years. The Central Government notifies All India Pingalwara Society (Regd.) under section 10(23C)(iv), designating it as an institution covered by the income-tax exemption provision for the assessment years 1983-84 to 1985-86, pursuant to the enabling clause empowering the Government to notify such institutions.