In developing a High Value Change Proposal Sub-hubco must liaise with the Authority and relevant end users (being such persons or organisations as Sub-hubco in consultation with the Authority considers appropriate). The Authority must provide Sub-hubco with such information about its requirements as Sub-hubco reasonably requires and must assist Sub-hubco in the review of any draft designs in relation to the High Value Change Proposal. Any and all information and other input or feedback provided by the Authority to Sub-hubco, unless expressly stated otherwise by the Authority, will be without warranty and will be provided without prejudice to the Authority's rights under this Section 4 (High Value Changes).