premise: All such Proprietary Information (whether prepared by the Recipient or its Representatives on its behalf) shall be returned or destroyed, at the election of Disclosing Party or upon request of Disclosing Party provided, however, that all notes, analyses, conditions, studies, interpretations, memoranda or other documents, to the extent that they contain, reflect or are based upon the Proprietary Information, may be destroyed (rather than delivered); provided further that Board or Board Committee minutes need neither be delivered nor destroyed. 