Article 18
The conditions under which bred seed potatoes of generations prior to basic seed potatoes may be placed on the market under Article 4, shall be as follows: (a) they must have been produced in accordance with accepted practices for the maintenance of the variety and of health; (b) they must be intended mainly for the production of basic seed potatoes; (c) they must satisfy the minimum conditions to be established by the procedure referred to in Article 25(2) for pre-basic seed potatoes; (d) they must have been found by official examination to satisfy the minimum conditions referred to in (c); (e) they must be placed in packages or containers in accordance with this Directive; and (f) the packages or containers must bear an official label giving at least the following particulars: - certification authority and Member State or their distinguishing abbreviation, - producer's identification number or lot reference number, - month and year of sealing, - species, indicated at least in roman characters, under its botanical name, which may be given in abridged form and without the authors' names, or under its common name, or both, - variety, indicated at least in roman characters, - the description "pre-basic seed potatoes". The label shall be white with a diagonal violet line.