EC - FWC services Dec 2018  Contract no: [complete]  In the case of joint tenders, the contracting authority may terminate the FWC or a  specific contract  with  each member of the group separately on the basis of points (d), (e), (g), (m) and (n) of Article II.18.1,  under the conditions set out in Article II.11.2.  Invoices must contain the contractor’s (or leader’s in the case of a joint tender) identification data, the  amount, the currency and the date, as well as the FWC reference and reference to the  specific contract . Invoices must indicate the place of taxation of the contractor (or leader in the case of a joint tender) for  value added tax (VAT) purposes and must specify separately amounts not including VAT and amounts  including VAT.  The contracting authority is exempt from all taxes and duties, including VAT, in accordance with Articles  3 and 4 of the Protocol 7 of the Treaty on the Functioning of the European Union on the privileges and  immunities of the European Union.  The contractor (or leader in the case of a joint tender) must complete the necessary formalities with the  relevant authorities to ensure that the supplies and services required for  implementation of the FWC  are  exempt from taxes and duties, including VAT.  If provided for in the special conditions, the contractor (or leader in the case of a joint tender) submits  invoices in electronic format if the conditions regarding electronic signature specified by Directive  2006/112/EC on VAT are fulfilled, i.e. using a qualified electronic signature or through electronic data  interchange. Reception of invoices by standard format (pdf) or email is not accepted.  If a price revision index is provided in Article I.5.2, this Article applies to it. Prices are fixed and not subject to revision during the first year of the FWC.  At the beginning of the second and every following year of the FWC, each price may be revised upwards  or downwards at the request of one of the parties.  A party may request a price revision in writing no later than three months before the anniversary date of  entry into force of the FWC. The other party must acknowledge the request within 14 days of receipt. At the anniversary date, the contracting authority must communicate the final index for the month in  which the request was received, or failing that, the last provisional index available for that month. The  contractor establishes the new price on this basis and communicates it as soon as possible to the  contracting authority for verification. The contracting authority purchases on the basis of the prices in force at the date on which the  specific  contract  enters into force. The price revision is calculated using the following formula:  30 II.20. PRICE REVISION  II.19.2. E-invoicing  II.19.1. Invoices and value added tax  II.19. INVOICES, VALUE ADDED TAX AND E-INVOICING 