b) a positive and related order confirmation message has been successfully sent from the contractor  to the contracting authority (equivalent to the contractor  's signature) ;  and 

c) a final message endorsing the order has been sent by the contracting authority  to the contractor  and successfully received by him (equivalent to the contracting authority 's signature). 

6.4. A dispatch advice , invoice or debit/credit note shall be deemed to have been legally issued or sent: 

a) In case of using web services , when its status is set to "received" as defined in the interface control document. 

b) In case of using the supplier portal , when the contractor is able to successfully submit the e-document without any error messages. The XML document related to the e- document is considered as a proof of receipt by the contracting authority. 

6.5. A request for quotation  or a receipt advice is deemed to have been legally sent by the contracting authority  when the message has been successfully received by the contractor . 

## 7. ADMISSIBILITY 

To the extent permitted by the applicable law, the parties hereby agree that in the event of dispute, the electronic documents (including, in the case of using the web services , the records of the EDI messages maintained in accordance with the terms and conditions of this agreement) shall be admissible before the courts and shall constitute evidence of the facts contained therein unless evidence to the contrary is adduced. 

## 8. STORAGE OF ELECTRONIC DOCUMENTS 

8.1 When using web services  all EDI messages  exchanged by the parties shall be stored by each party, unaltered and securely, in accordance with the time limits and specifications prescribed by the applicable legislative requirements. The parties agree that EDI messages that have been stored may be reproduced on any type of data carrier whatsoever and may be made legible by means of said reproduction. 

8.2 When using the supplier portal , the contractor shall download the PDF or XML message for each e-document within one year of submission, and store them securely. After this period, copies of the e-documents are no longer available for automatic download from the supplier portal . 

## 9. ENTRY INTO FORCE 

This agreement shall enter into force on the date of signature of the contract  by the last party and shall become applicable for each module from the date indicated in section 1.2 of this agreement. 

## 10. AMENDMENTS 

10.1. Any amendment to the agreement must be made in writing and agreed by both parties. 

10.2. Amendments will be part of the present agreement from the time of their signature by the last party. 

