Within three years following the signature of the contract resulting from the current call for tenders, the Contracting authority may use the negotiated procedure under point 11.1.e of Annex 1 to Regulation (EU, Euratom) 2018/1046 of the European Parliament and of the Council of 18 July 2018 on the financial rules applicable to the general budget of the Union$^{18}$ to procure new services from the contractor(s) up to a maximum of 50% of the initial contract value. These services will consist in the repetition of similar services entrusted to the contractor(s). 

## 1.8. Duration of the contract and starting date 

The contract(s) resulting from the award of this call for tenders will be concluded for 36 months. The details of the initial contract duration and possible renewals are set out in Article I.3 of the Draft contract. 

## 1.9. Electronic exchange system 

For all exchanges with the contractor during the implementation of the contract as well as for future possible subsequent proceedings for the purposes of EDES (European Union's Early Detection and Exclusion System) the Contracting authority  may use an electronic exchange system meeting the requirements of Article 148 of Regulation (EU, Euratom) 2018/1046 of the European Parliament and of the Council of 18 July 2018 on the financial rules applicable to the general budget of the Union$^{18}$. At the request of the Contracting authority  the use of such a system shall become mandatory for the contractor(s) at no additional cost for the Contracting authority . Details on specifications, access, terms and conditions of use will be provided in advance. 

