Certification pursuant to Article 4 shall for each participating Member State in each year be limited to a quantity of experimental seed tubers not exceeding 0,3 % of seed potatoes produced or a maximum of 10 hectares of seed potatoes planted in that year in the participating Member State concerned.
By 30 April of each year, each producer shall declare to the certification authority the size of the area on which he intends to produce experimental seed tubers that year.