Contract conditions of December 2015  Contract number: [ complete ]  II.5. COMMUNICATION BETWEEN THE PARTIES  II.5.1. Form and means of communication  II.5.2. Date of communications by mail and email  (a) be made in writing in paper or electronic format in the language of the contract; (b) bear the contract number;  (c) be made using the relevant communication details set out in Article I.8; and  (d) be sent by mail, email or, for the documents specified in the special conditions, via  e-PRIOR . The supplies must be guaranteed against all defects in manufacture or materials for two  years from the date of delivery, unless provision is made for a longer period in the tender  specifications.  The contractor must guarantee that any permits and licences required for manufacturing  and selling the supplies have been obtained.  The contractor must replace at its own expense, within a reasonable time limit to be  determined by agreement between the parties, any items which become damaged or  defective in the course of normal use during the guarantee period.  The contractor is responsible for any conformity defect which exists at the time of  delivery, even if this defect does not appear until a later date.  The contractor is also responsible for any conformity defect which occurs after delivery  and is ascribable to non-compliance with its obligations, including failure to provide a  guarantee that, for a certain period, supplies used for the purposes for which they are  normally used or for a specific purpose will preserve their qualities or characteristics as  specified.  If part of an item is replaced, the replacement part must be guaranteed under the same  terms and conditions for a further period of the same duration as that specified above.  If a defect is found to originate in a systematic flaw in design, the contractor must replace  or modify all identical parts incorporated in the other supplies that are part of the order,  even though they may not have been the cause of any incident. In this case, the guarantee  period must be extended as stated above.  Any communication of information, notices or documents under the contract must:  If a party requests written confirmation of an e-mail within a reasonable time, the other  party must provide an original signed paper version of the communication as soon as  possible.  The parties agree that any communication made by email has full legal effect and is  admissible as evidence in judicial proceedings.  Any communication is deemed to have been made when the receiving party receives it,  unless this contract refers to the date when the communication was sent.  16 