When an operative event is fixed under Union legislation, the exchange rate to be used shall be the most recent rate set by the European Central Bank (ECB) prior to the first day of the month in which the operative event occurs.

However, in the following cases, the exchange rate to be used shall be:

1. (a)

   for the cases referred to in Article 28(2) of this Regulation in which the operative event for the exchange rate is the acceptance of the customs declaration, the rate referred to in Article 18(1) of Regulation (EEC) No 2913/92;

2. (b)

   for intervention expenditure incurred in the context of public storage operations, the rate resulting from the application of Article 3(2) of Commission Delegated Regulation (EU) No 906/201426;

3. (c)

   for the minimum price for beet referred to in Article 33 of this Regulation, the average rate established by the European Central Bank (ECB) for the month prior to the operative event.