Certification pursuant to Article 4 shall for each participating F1responsible authority 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 F2territory for which the responsible authority concerned is the appropriate authority.

By 30 April of each year, each producer shall declare to the F3appropriate authority the size of the area on which he intends to produce experimental seed tubers that year.