Contract number: ECHA/2020/666  transfer of documents, the parties agree that an e-document, sent as mentioned in  the  interface control document , qualifies as an  EDI message . 3. If the e-document is dispatched through the  supplier portal , it is deemed to have  been legally issued or sent when the contractor (or leader in the case of a joint  tender) is able to successfully submit the e-document without any error messages.  The generated PDF and XML document for the e-document are considered as a proof  of receipt by the contracting authority. 4. In the event that an e-document is dispatched using a direct connection established  between the parties’  back offices , the e-document is deemed to have been legally  issued or sent when its status is ‘received’ as defined in the  interface control  document . 5. When using the  supplier portal , the contractor (or leader in the case of a joint  tender) can download the PDF or XML message for each e-document for one year  after submission. After this period, copies of the e-documents are no longer  available for automatic download from the  supplier portal . The contractor submits a request for each person who needs to be assigned the role of  ‘user’ in  e-PRIOR . These persons are identified by means of the European Communication  Authentication Service (ECAS) and authorised to access and perform actions in  e-PRIOR within the permissions of the user roles that the contracting authority has assigned to  them.  User roles enabling these  e-PRIOR  authorised persons to sign legally binding documents  such as specific tenders or specific contracts are granted only upon submission of  supporting documents proving that the authorised person is empowered to act as a legal  representative of the contractor. II.5.5. Authorised persons in e-PRIOR  II.6. LIABILITY  II.6.4  If a third party brings any action against the contracting authority in connection  with the  implementation of the FWC , including any action for alleged breach of  intellectual property rights or the applicable data protection legislation, the  contractor must assist the contracting authority in the legal proceedings, including  by  intervening  in  support  of  the  contracting  authority  upon  request. If the contracting authority’s liability towards the third party is established and that  II.6.3  The contractor is liable for any loss or damage caused to the contracting authority  during or as a consequence of  implementation of the FWC , including in the event of  subcontracting, but only up to an amount not exceeding three times the total  amount of the relevant specific contract. However, if the damage or loss is caused  by the gross negligence or wilful misconduct, or any infringement of the applicable  data protection legislation, of the contractor or of its  personnel  or subcontractors,  the contractor is liable for the whole amount of the damage or loss.  II.6.2  If required by the relevant applicable legislation, the contractor must take out an  insurance policy against risks and damage or loss relating to the  implementation of  the FWC . It must also take out supplementary insurance as reasonably required by  standard practice in the industry. Upon request, the contractor must provide  evidence of insurance coverage to the contracting authority.  II.6.1  The contracting authority is not liable for any damage or loss caused by the  contractor, including any damage or loss to third parties during or as a consequence  of  implementation of the FWC . 26 