5. Unless, at or before the trial, the Court or a Judge in chambers for special reasons otherwise orders or directs, no plan, photograph or model shall be receivable in evidence at the trial of an action unless at least ten days before the commencement of the trial, the parties, other than the party producing it, have been given an opportunity to inspect it and to agree to the admission thereof without further proof. 6. In an action, of whatever nature, arising out of an accident on land due to a collision or apprehended collision(a) no plan of the place where the accident happened other than a sketch plan, shall be receivable in evidence unless, at or before the trial, the Court or Judge in chambers authorizes the reception thereof; (b) unless, at or before the trial the Court or Judge in chambers otherwise or directs, the oral expert evidence of an engineer sought to be called on account of his skill and knowledge as respects motor vehicles shall not be receivable unless a copy of a report from him containing the substance of his evidence has been made available to all parties for inspection. 7. Any order or direction under rules 2, 3, 4, 5 and 6 of this Order, may, on sufficient cause being shown, be revoked or varied by a subsequent order or direction of the Court or a Judge in chambers, made or given at or before the trial. 8. Rules 1, 2, 3, 4, 5, 6 and 7 of this Order shall apply to trials of issues, references, inquiries and assessments of damages as they apply to the trial of actions. 9. Office copies of all writs, records, pleadings and documents filed in the Court shall be admissible in evidence in all causes and matters and between all persons or parties, to the same extent as the original would be admissible. 10. (1) The Court or Judge in chambers may, in any action where it appears necessary for the purpose of justice, make an order for the examination upon oath before the Court or a Judge in chambers or any officer of the Court or any other person and at any place, of any witness or person and may empower any party to any such action to give on deposition any evidence therein. (2) Any order under paragraph (1) of this rule may be made on such terms (including, in particular terms as to the giving of discovery before the examination takes place) as the Court or Judge in chambers may think fit. (3) The Court or a Judge in chambers may order the party who has applied for the appointment of an examiner to pay the fees and expenses of the examiner (without prejudice to any question as to the party by whom the costs of the examination should eventually be borne): Provided that, where the examiner is a Government servant not entitled to receive fees, such fees shall be paid into revenue. 11. An order for a commission to examine witnesses shall be in Form 62 in the Appendix to these Rules and the writ of commission a shall be in Form 43 in the Appendix to these Rules with such variations as circumstances may require. 12. (1) If, in any case, the Court or a Judge in chambers so orders, there shall be issued a request to examine witnesses in lieu of a commission. (2) Forms 63 and 64 in the Appendix to these Rules shall be used for the order and request respectively with such variations as circumstances may require. 13. Where an order is made for the issue of a request to examine a witness or witnesses in any foreign country with which a Convention in that behalf has been or shall be made, the following procedure shall be adopted(a) the party obtaining the order shall file in the Registry an undertaking in Form 65 in the appendix to these Rules which Form may be varied as may be necessary to meet the circumstances of the particular in which it is used; (b) the undertaking shall be accompanied by-