Notification under section 10(23C)(iv) grants tax recognition to a labour board subject to specified compliance conditions. Central Government notification designates the Bombay Iron & Steel Labour Board as eligible under clause (23C)(iv) of section 10 of the Income-tax Act for assessment years 1990-91 to 1992-93, subject to conditions that income be applied exclusively to its objects, investments be limited to modes specified in section 11(5) (with exception for certain voluntary contributions in forms like jewellery or furniture), business profits be excluded unless incidental with separate accounts, regular filing of returns, and transfer of surplus and assets to a charitable organisation upon dissolution.