Revision of contract
۱. When circumstances have arisen or are likely to arise which, in the opinion of either party, would render the contract inequitable or make it impracticable or impossible to achieve the objectives set out in the contract or in Part XI, the parties shall enter into negotiations to revise it accordingly.
۲. Any contract entered into in accordance with article ۱۵۳, paragraph ۳, may be revised only with the consent of the parties.