General Administrative and Submission Clauses Last updated: June 2020 Page 7 of 21  4. Content and Submission of Tenders  4.1.  Language of the tender 4.2.  Content of the tender  4.3.  Packaging the tender  (in case of e-Submission, please refer to point  4.5 and Appendix I) presentation. Tenderers will not be permitted to modify the terms and conditions of their tender  during their presentation or at any other time after the tender has been submitted to the EIB.  Unless otherwise provided in the `Terms of Reference` tenders must be submitted in either in English  or in French, since both are working languages of EIB. Any third-party certificates or documents (if  required) whose original language is not English or French must be submitted in its original language  together with an English or French translation.  The structure and content of the tender shall comply with the requirements set out in  point 2  of the  `Terms of Reference`.  Documentation submitted must be recent, valid and not more than 12 (twelve) months old (unless  otherwise permitted). Where documents would become obsolete during the procurement process,  the EIB reserves the right to request such document again.  Tenders must be submitted using the double envelope system (i.e. three inner envelopes inside one  outer envelope) in order to guarantee the confidentiality and integrity of data. Tenders must be submitted enclosed in three sealed envelopes according to their content  ( ‘ Envelope I – Administrative information ’ ,  ‘ Envelope II – Technical proposal ’ and  ‘ Envelope  III – Financial proposal’ ).  Inner Envelopes :  Each of these three inner envelopes must be sealed and bear a label identifying the envelope  number, the name of the Tenderer and the Tender Reference. The information contained in each inner envelope must be presented as one paper original and one  electronic copy.  N.B.  Electronic copies shall be provided in searchable OCR PDF format identical to the paper  version and may be in the form of either CD/DVDs or USB devices but  MUST NOT  be password  protected. In case of discrepancies between the paper and electronic versions, the paper version  shall prevail.  Outer Envelope:  The three sealed inner envelopes shall be inserted in one sealed outer envelope which shall be  marked as follows:  TENDER– NOT TO BE OPENED BY INTERNAL MAIL DEPARTMENT Tender Ref. No................................  Tender Title: ...................................  Name of the Tenderer :  ................................