premise: Each party shall: (a) within one (1) month of completion of the purpose or receipt of a written request from the other party, return to the other party all documents and materials (and all copies thereof) containing the other party's Confidential Information and certify in writing to the other party that it has complied with the requirements of this sub-clause; and (b) notwithstanding the completion of the Purpose or return of the documents and materials as aforesaid, continue to be bound by the undertakings set out in Clause 2.