(3) Where an interest in land is acquired by agreement in pursuance of a contract made after the appointed day by a person authorised by virtue of any enactment to acquire 'it compulsorily, being an interest in a hereditament or part of a hereditament which has sustained war damage any of which has not been made good before the date of the contract, then if the appropriate payment under the War Damage Act, 1943, would, apart from the acquisition or apart from any direction given by the Treasury under Section twenty of that Act be a payment of cost of works, the right to receive any value payment or share of the value payment which, under that Act, is payable in respect of the interst so acquired (including any interest payable thereon) shall, notwith-standing anything in that Act, vest in the person by whom the interest is acquired as aforesaid.