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1. The Participants shall, under the provisions of the present Arrangement and in particular of Article 5 thereof, undertake in close cooperation with the United States Authorities a programme having as its objective the definition, design, development and construction of the Spacelab as a technically integrated part of the United States' shuttle and orbital system and Europe's contribution to the post-Apollo programme with which it is to be used.
2. The objectives and elements of the Spacelab programme are described in Annex A to the present Arrangement.
2. The objectives and elements of the Spacelab programme are described in Annex A to the present Arrangement.