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## Invoices and value added tax II.19.1. 

##  INVOICES, VALUE ADDED TAX AND E-INVOICING II.19. 

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 contract reference. 

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 performance of the contract  are exempt from taxes and duties, including VAT. 

## E-invoicing II.19.2. 

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. 

## PRICE REVISION II.20. 

If a price revision index is provided in Article I.4.2, this Article applies to it. 

Prices are fixed and not subject to revision during the first year of the contract. 

At the beginning of the second and every following year of the contract, 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 contract. 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 price revision is calculated using the following formula: 

<img src='content_image/499668.jpg'>

where: Pr = revised price; 

