Tax exemption under section 10(23C)(iv) conditioned on exclusive application of income, restricted investments, and reporting obligations. Notification designates The Railway Goods Clearing & Forwarding Establishment Labour Board, Mumbai as eligible for a tax exemption under Section 10(23C)(iv), conditional on applying or accumulating income exclusively for its objects; restricting investments to permitted forms; excluding profits from business unless incidental with separate books; regular filing of returns; and transferring surplus assets on dissolution to a like charitable organisation.