premise: Immediately upon  (a) termination or expiration of this Agreement,  (b) the decision by either Party not to enter into the business or scientific relationship contemplated above, or  (c) a request by Disclosing Party at any time, Receiving Party will promptly turn over to Disclosing Party, or destroy, all Confidential Information of Disclosing Party and all documents, media, and other tangible materials containing any such Confidential Information and any and all extracts thereof. 