‹ Article 53 - Implied Obligations Article 55 - Duty to achieve a specific result and duty of reasonable efforts › Article 54 - Co-operation between the parties Each party shall co-operate with the other party when such co-operation may reasonably be expected for the performance of that party's obligations. ‹ Article 53 - Implied Obligations Article 55 - Duty to achieve a specific result and duty of reasonable efforts ›