All the values of supplies of goods and services declared either in the Notification or in Quarterly report must be denominated in Euro. MS of exemption, which has not adopted the euro may require the values to be expressed in its national currency. If the supplies have been made in other currencies, the taxable person shall use the exchange rate applying on the first day of the calendar year. The conversion shall be made by applying the exchange rate published by the European Central Bank for that day, or, if there is no publication on that day, on the next day of publication.