premise: Immediately upon  (i) the decision by either party not to enter into a relationship as a result of the exchange of information hereunder, or  (ii) a request by the Disclosing Party at any time, the Receiving Party will turn over to the Disclosing Party all Proprietary Information of the Disclosing Party and all documents or media containing any such Proprietary Information and any and all copies or extracts or derivatives thereof to the extent it is requested by either party in writing, except that a single copy may be retained for legal archival purposes, subject to protection and non-disclosure in accordance with the term of this agreement. 