Arbitration  Crown rights  32 43.  Except where otherwise expressly provided for in this Order and unless otherwise agreed  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.  44. —(1) Nothing in this Order affects prejudicially any estate right, power, privilege, authority  or exemption of the Crown and in particular, nothing in this Order authorises the undertaker to  take, use, enter upon or in any manner interfere with any land or rights of any description  (including any river, channel, creek, bay or estuary)—  (2) Paragraph (1) does not apply to the exercise of any right under this Order for the compulsory  purchase of any interest in any Crown land (as defined in the 2008 Act) for the time being held  otherwise than by or on behalf of the Crown.  (3) A consent under paragraph (1) may be given unconditionally or subject to terms and  conditions; and is deemed to have been given in writing where it is sent electronically.  (4) Nothing in this Order shall authorise the compulsory acquisition of any interest in the Order  Land held by or on behalf of the Duchy of Lancaster.  Signed by authority of the Secretary of State  Susan Anderson Head of the Transport and Works Act Unit  Department for Transport  9th April 2020  (a) belonging to Her Majesty in right of the Crown and forming part of the Crown Estate  without the consent in writing of the Crown Estate Commissioners;  (b) belonging to Her Majesty in right of the Crown and forming part of the Crown Estate  without the consent in writing of the government department having the management of  that land; or  (c) belonging to a government department or held in trust for Her Majesty for the purposes of  a government department without the consent in writing of that government department. 