F44 Declaration, ExchangeRate and Ad Valorem Tax Validation

From March 16th, as indicated in the separate section, it will be permitted to declare the euro exchange rate data in the ExchangeRate label of the subheading – GoodsShipment – ​​in the following case:
Euro exchange rate for the additional F44 regime, indicating the euro exchange rate prior to the activation of the declaration. It cannot be zero.
If the euro exchange rate is not declared in ExchangeRate, the euro exchange rate in effect on the date of admission at the time of activation of the declaration will be assumed, and furthermore
The taxable base of the declared ad valorem taxes (such as A00, A30, A35, A40, A45, BOO and B01) will not be validated