6.-(1) The claimant shall, within 28 days from the service on him of the registrar's notice in Form 2, give to the registrar and to the Acquiring Authority, at their address for service, a written statement (together with three copies thereof in the case of the registrar) showing the amount claimed by him as compensation with full particulars in support thereof.
(2) The Acquiring Authority shall, within 28 days from the service on it of the registrar's notice in Form 2, give to the registrar and to the claimant, at his address for service, a written statement (together with three copies thereof in the case of the registrar) showing the valuation of the land which is the subject of the proceedings with full particulars in support thereof.
(3) The Acquiring Authority shall in all cases send to the registrar four copies of the plan of the land which is the subject of the proceedings, within 28 days after the filing of the notice of reference, together with sufficient copies of such plan for service upon each of the other parties, unless in the meantime the Acquiring Authority is required by the registrar to send such plan to him under the provisions of Rule 19(3).