12.—(1) If any person suffers a diminution in the value of any property or interest in consequence of the operation of paragraph 11 in relation to any provision, such compensation as may be just shall be paid to him by the nominated body.N.I.
(2) Any dispute as to whether, and, if so, how much, compensation is payable under this paragraph shall be referred to and determined by an arbitrator appointed in accordance with regulations made by the Department.
(3) In sub-paragraph (1), the reference to the nominated body is to the body specified by the approved scheme as the body against which any claim for compensation under this paragraph in relation to the provision concerned is to be made.