If a person is given, or acquires from one or more persons with whom he is connected, by way of two or more gifts or other transactions, assets of which the aggregate market value, when considered separately in relation to the separate gifts or other transactions, is less than their aggregate market value when considered together, then for the purposes of this Act their market value, where relevant, shall be taken to be the larger market value, to be apportioned rateably to the respective disposals.