premise: Immediately upon the Disclosing Party’s request or by the last date defined in clause 3.2, the Receiving Party shall return/or destroy, at the Disclosing Party’s discretion and expense, all the Disclosing Party’s Confidential Information in its possession, irrespective of the media, and certify execution of this obligation in writing.  This obligation shall not apply to  (i) copies retained in compliance with a Party’s legal or regulatory obligations or  (ii) copies made as part of preexisting data back-up processes, if such copies are not accessible to the Receiving Party’s staff or Authorized Persons in the normal course of business.