4. Where the additional checks report referred to in paragraph 3 of this Article identifies misstatements, non-conformities or miscalculations resulting in a non-conformity with the requirements set out in Article 4 or 6 and, consequently, in a FuelEU penalty or a modification of the amount of a FuelEU penalty already paid, the competent authority referred to in paragraph 1 of this Article shall notify to the company concerned the corresponding amount of the FuelEU penalty or of the modified FuelEU penalty. Member States shall ensure that the company responsible for the ship during the period subject to the additional checks shall pay an amount equal to the FuelEU penalty or the modified FuelEU penalty within one month after its notification, in accordance with the arrangements provided for in Article 23.