(iv) Receiving Party shall immediately, at Disclosing Party’s request, return all originals, copies, reproductions and summaries of Confidential Information and all other tangible materials and devices provided to the Receiving Party as Confidential Information, or at Disclosing Party's option, certify destruction of the same, subject to the retention of copies of Confidential Information by any of the Receiving Party’s advisors because of obligations imposed by regulatory authorities.