18. A producer who in any quota year comes within the first indent of Article 3(7) of the Commission Regulation (which concerns the representative fat content of milk from certain new producers) may benefit from the negative correction provided for in the third sub-paragraph of Article 4(1) thereof only if, before 1st March in that quota year, he or she confirms to the National Assembly that in that quota year he or she has maintained in his or her dairy herd breeds of cow with characteristics similar to those in the herd in the first 12 months of production and undertakes to maintain such breeds in his or her dairy herd for the remainder of that quota year.