A tender received after the time-limit for receipt of tenders will be rejected. The submission  receipt provided by eSubmission with the official date and time of receipt of the submission  (timestamp) constitutes proof of compliance with the time-limit for receipt of tenders$^{4}$. 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.1 of 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 tender$^{5}$, or withdraw it and replace it with a new one$^{6}$. 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 IV.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  4 If no submission receipt is received in reasonable time after submission, please contact the eSubmission  Helpdesk (see contact details in the above referred eSubmission Quick Guide) as soon as possible.  $^{5}$ A submitted tender can be withdrawn directly in the "Procurement/My Submission(s)" area in the F&T Portal.  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 eSubmission 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.  2  2. Legal effects of the invitation to tender and submission of a tender. 