 expressed in euros. Tenderers from countries outside the euro zone have to quote their prices in euro. The price quoted may not be revised in line with exchange rate movements. It is for the tenderer to bear the risks or the benefits deriving from any variation. 

 quoted free of all duties, taxes and other charges, i.e. also free of VAT. 

 The European Union Institutions are exempt from such charges in the EU under Articles 3 and 4 of the Protocol on the Privileges and Immunities of the European Union of 8 April 1965 annexed to the Treaty on the Functioning of the European Union. Exemption is granted to the Commission by the governments of the Member States, either through refunds upon presentation of documentary evidence or by direct exemption. 

In case of doubt about the applicable VAT system, it is the tenderer's responsibility to contact his or her national authorities to clarify the way in which the European Union is exempt from VAT. 

## 4.4. Signature policy: how can documents be signed? 

Where a document needs to be signed, the signature must be either hand-written, a qualified electronic signature or an advanced electronic signature based on a qualified certificate as defined in Regulation (EU) No 910/2014 on electronic identification and trust services for electronic transactions in the internal market (the eIDAS Regulation ). 

For electronic signatures see: https://webgate.ec.europa.eu/fpfis/wikis/x/iwX4Dg 

All documents must be signed by the signatories (when they are individuals) or by their duly authorised representatives. 

For the following documents, when signed by representatives, candidates/tenderers must provide evidence for the delegation of the authorisation to sign: 

- The Declaration on Honour of the candidate (in case of joint tender – the Declarations on Honour of all group members); 

- (If applicable – in the case of joint tender) the power(s) of attorney drawn up using the model attached in Annex 4 ). 

The delegation of the authorisation to sign on behalf of the signatories (including, in the case of proxy(-ies), the chain of authorisations) must be evidenced by appropriate written evidence (copy of the notice of appointment of the persons authorised to represent the legal entity in signing contracts (together or alone), or a copy of the publication of such appointment if the legislation which applies to signatory requires such publication or a power of attorney). A document that the Contracting authority  can access on a national database free of charge does not need to be submitted if the Contracting authority  is provided with the exact internet link and, if applicable, the necessary identification data to retrieve the document. 

