Invitation  to tender No ECHA/2O2O/666 Restricted 2  (s) Tenderers must ensure that their submitted tenders contain all the  information  and  documents required  by the contracting authority  at the time of submission as set out in the  procurement documents. The Declaration(s) on Honour on exclusion and selection criteria  (template  available in the tender specifications) shall be dated  and signed, either by  hand  or by applying a  qualified  electronic signature,  by an authorised  representative  of the  signatory. When  the  Declaration(s) on Honour  is/are  signed by  hand,  a scanned copy  must  be  attached to the tender in eSubmission.  The hand-signed original(s) must be sent by letter to the contracting authority’s  postal  address  specified  under  Heading I.1of  the contract  notice  at the  latest on the first working day following the electronic submission  of tender. The envelope, clearly mentioning the reference to the call for tenders and the  eSubmission ID  of the  tender must be marked as "CALL  FOR  TENDERS  -  NOT TO BE OPENED BY  THE  INTERNAL MAIL  DEPARTMENT".  Only  the original(s) of  the Declaration on Honour are to be sent by  letter, not  other documents. After  submitting  a tender, but before the deadline  for receipt  of tenders, a tenderer  may definitively withdraw  its  tenders, or  withdraw it and replace it with a new one6, A withdrawal receipt will  be  provided  by  eSubmission  as  proof  of  withdrawal. All  costs  incurred for the  preparation  and submission of tenders are to  be  borne by the  tenderers and  will not  be  reimbursed, This invitation to tender is  in no way binding  on  the  contracting  authority. The contracting authority’s contractual obligation  commences only when the contract  with  the successful tenderer  is  signed  by both  parties. Up to the signature  of the contract the contracting authority  may  cancel the  procurement procedure  without tenderers being entitled to claim any compensation.  Any  such decision  must be substantiated  and tenderers notified. The validity  period  of the tender, during  which  tenderers  may not modify  the terms of  their tenders  in any respect, is indicated under  Heading [V.2.6  of the contract  notice. Submission of a tender  implies acceptance of all the terms and conditions set out  in  the procurement  documents and,  where appropriate,  waiver  of the tenderer’s own  general  or specific terms and conditions.  The submitted tender  is  binding on the tenderer to  whom  the contract  is awarded for the duration of the contract, $^{s }$For  detailed  instructions on  how  to  withdraw a tender  please  consult the above referred eSubmission  Quick  Guide. $^{6 }$To  submit a  new version,  the  tenderer must create a  new  tender  in  e-Submission and  include  all the  information and documents  required  in  the  procurement  documents  with the submission of  a  tender, even if some of them have already been  included in the replaced tender. Telakkakatu  6,  P,O. Box 400, FI-00121 Helsinki,  Finland  I  Tel.  +358  $^{9 686180 }$| Fax  +358  9 68618210  |  echa.europa.eu 2. Legal effects of the  invitation to tender and submission of a tender.