Use of the euro
Article 133
1. Member States which have not adopted the euro as their currency on the date of an application for payment shall convert the amounts of expenditure incurred in national currency into euro. Those amounts shall be converted into euro using the monthly accounting exchange rate of the Commission in the month during which the expenditure was registered in the accounts of the certifying authority of the operational programme concerned. The exchange rate shall be published electronically by the Commission each month. 2. By way of derogation from paragraph 1, the ETC Regulation may establish specific rules on the timing for conversion into euro. 3. When the euro becomes the currency of a Member State, the conversion procedure set out in paragraph 1 shall continue to apply to all expenditure recorded in the accounts by the certifying authority before the date of entry into force of the fixed conversion rate between the national currency and the euro.