"Description Of Amendment/Modification: This Supplemental Agreement supersedes the Stop Work Modifications 1940 and 1906, the Stage Storage Modifications 1880 and 1804, and Supplemental Agreement 1943 in their entirety. All work performed and all costs incurred under the Modifications 1940, 1880, 1804, and 1943 are hereby deemed to have been performed and incurred under this modification as of the date indicated hereon. A Specification Change Notice to the document SID 66-205B shall be processed defining the work performed under the superseded modifications."