In the event of the occurrence of any one or more of the events of default specified in paragraph (a) of this Article 26, upon payment of any unpaid costs by Purchaser up to the date of default, which is not contested by Contractor, or, which if contested, is resolved in Purchaser’s favor under DISPUTES Article 33, then Purchaser may, at its election, terminate this Contract on written notice to Contractor and exercise its rights below.