Article 18U.K.
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:
they must have been produced in accordance with accepted practices for the maintenance of the variety and of health;
they must be intended mainly for the production of basic seed potatoes;
they must satisfy the minimum conditions to be established by the procedure referred to in Article 25(2) for pre-basic seed potatoes;
they must have been found by official examination to satisfy the minimum conditions referred to in (c);
they must be placed in packages or containers in accordance with this Directive; and
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.