12.1 The Parties shall attend and participate in Reviews or Periodic Reviews in good faith, fairly, reasonably, in the spirit of partnering set out in clause 8 above and having regard to each others' budgets and resources.
12.2 The test of reasonableness shall be applied having regard to any Party's obligation to consult its contractors on any matter which might affect such contracts.
12.3 Except as provided for otherwise in this Agreement no Party shall be required to agree to any amendment, termination, variation to this Agreement as a result of a Review or a Periodic Review but shall always act reasonably and promptly in issuing a response where requested to do so.
12.4 As a result of a Review or a Periodic Review the Parties may agree to vary this Agreement by way of a Deed of Variation or to terminate it in whole or in part.