18.2  Changes to terms of Appointment

Neither the Authority nor the Contractor shall without the other's prior written approval (not to be unreasonably withheld or delayed):

18.2.1  terminate, repudiate or discharge the Independent Certifier's Deed of Appointment or treat the same as having been terminated, repudiated or otherwise discharged; or

18.2.2  waive, settle, compromise or otherwise prejudice any rights or claims which the other may from time to time have against the Independent Certifier; or

18.2.3  vary the terms of the Independent Certifier's Deed of Appointment or the service performed or to be performed by the Independent Certifier.