(7) Where the recipient of a notice or other document served or sent by electronic transmission  notifies the sender within 7 days of receipt that the recipient requires a paper copy of all or part of  that notice or other document the sender must provide such a copy as soon as reasonably  practicable.  (8) Any consent to the use of electronic communication given by a person may be revoked by  that person in accordance with paragraph (9).  (9) Where a person is no longer willing to accept the use of electronic transmission for any of  the purposes of this Order—  (10) This article must not be taken to exclude the employment of any method of service not  expressly provided for by it.  (11) In this article “legible in all material respects” means that the information contained in the  notice or document is available to that person to no lesser extent than it would be if served, given  or supplied by means of a notice or document in printed form.  62. —(1) Except where otherwise expressly provided for in this Order and unless otherwise  agreed in writing between the parties, any difference under any provision of this Order (other than  a difference which falls to be determined by the tribunal) must be referred to and settled by a  single arbitrator to be agreed between the parties or, failing agreement, to be appointed on the  application of either party (after giving notice in writing to the other) by the President of the  Institution of Civil Engineers.  (2) Subject to any other provision of this Order, any arbitration to be undertaken under  paragraph (1) must be carried out using the same process as is set out in sub-paragraphs (2)(d) to  (f), (4) to (8) and (12) of paragraph 19 of Schedule 2 subject to the modifications set out in  paragraph (3).  (3) The modifications referred to in paragraph (2) are that references in those provisions of  Schedule 2 to each of the terms set out in column (1) of the following table are replaced by the  corresponding term in column (2) of the table—  63. —(1) Where any application is made to a relevant authority, the consent, agreement or  approval concerned must, if given, be given in writing and is not to be unreasonably withheld or  delayed.  (3) Any application to which this article applies must include a written statement that the  provisions of paragraph (2) apply to that application.  (2) If a relevant authority which has received an application fails to notify the undertaker of its  decision before the end of the period of 28 days beginning with the date on which the application  was received, the relevant authority is deemed to have given its consent, certification, agreement  or approval, as the case may be.  (4) In this article—  47 Consents, agreements, certifications and approvals  (1)  (2)  the adjudicator  the arbitrator appointed under article 62(1)  the appeal  the difference referred to arbitration  the discharging authority  the person or body with whom the difference  with the undertaker referred to arbitration exists  Arbitration  (a) that person must give notice in writing or by electronic transmission revoking any consent  given by that person for that purpose; and  (b) such revocation is final and takes effect on a date specified by the person in the notice but  that date must not be less than 7 days after the date on which the notice is given. 