2.Before 15 May each year, purchasers shall forward to the competent authority of the Member State a declaration summarising the statements referred to in paragraph 1, showing at least the total quantity and the average fat content of the milk delivered to them and, where so required by decision of the Member State, for each producer, the reference quantity and the representative fat content, the quantity corrected in accordance with Article 10(1), the sum of the individual reference quantities and the corrected quantities and the average fat content of those producers' production.Where applicable, purchasers shall declare that they have received no deliveries during the period concerned.