Determine which legal clause the following paragraph belongs to: ( a)  all In- put Material and all copies of information and data provided by the Customer or the Authorised Service Recipients to the Supplier for the purposes of this Agreement.  The Supplier shall certify to the Customer that it has not retained any copies of In- put Material or other information or data, except for one copy which the Supplier may use for audit purposes only and subject to the confidentiality obligations in Clause 15: and