premise: You shall, upon request by us at any time: 5.1.1 promptly destroy or return to us (at your option) all hard copy documents and other materials which are in a form reasonably capable of delivery containing or reflecting the Confidential Information and all copies thereof and ensure the destruction of all Derivative Information and confirm to us in writing that you have complied with this paragraph 5.1.1; and 5.1.2 ensure that where Confidential Information has not been destroyed or returned under paragraph 5.1.1, all reasonable steps are taken to erase from any computer under your control any document, disk or file to the extent containing, reflecting or generated from any Confidential Information and that, following such erasure, no steps will be taken to access or recover such material, save that you will be entitled to retain such copies of such Confidential Information  (a) to the extent required by law or regulation,  (b) to the extent required by your internal compliance procedures, or  (c) to the extent contained as back-ups or archives as a matter of reasonable routine process on your electronic information management and communications systems or servers and for which deletion or destruction would not be reasonably practicable (provided that no step will be taken to access or recover such Confidential Information and provided that such Confidential Information shall continue to be held subject to the terms of this agreement). 5.2  Any Confidential Information which, notwithstanding paragraph 5.1 is retained, will continue to be held subject to the terms of this agreement and you shall not further use or disclose to any person any such Confidential Information.