19.-(1) Not more than one expert witness on either side shall be heard unless otherwise ordered.
(2) An application for leave to call more than one expert witness may be made to the President in accordance with the provisions of Rule 9 or may be made to the Tribunal at the hearing.
(3) Where more than one party intends to call an expert witness, each such party shall, within 28 days after being so requested by the registrar, send to the registrar a copy of each of the following documents relating to the evidence to be given by his expert witness, together with sufficient copies of the documents for service upon each of the other such parties, that is to say:-
(i) every plan and valuation of the land which is the subject of the proceedings (including particulars and computations in support of such valuation) which it is proposed to put in evidence;
(ii) a statement of any prices, costs, or other particulars, and any plans, relating to a property or properties other than the said land which are proposed to be given in evidence in support of any such valuation, or a statement that no such prices, costs, particulars, or plans will be relied upon.
(4) The registrar shall, within 7 days after receiving all the documents required to be supplied by the parties under the last foregoing paragraph, send to each party copies of the documents supplied by the other party.
(5) If an application for leave to call more than one expert witness is made at the hearing and is granted by the Tribunal, or if at the hearing any party seeks to rely upon any plans, valuations, or particulars which appear to the Tribunal not to have been sent to the registrar in accordance with the foregoing provisions of this Rule, the Tribunal shall, unless it is satisfied that no prejudice to any other party will arise, adjourn the hearing on such terms as to costs or otherwise as it thinks fit.