Definitions
Article 1
For the purposes of this Directive, the following definitions shall apply:
1. ‘mother plant’ means an identified plant from which material is taken for propagation;
2. ‘micro-propagation’ means the practice of rapidly multiplying plant material to produce a large number of plants, using culture in vitro of differentiated vegetative buds or meristem taken from a plant.

Minimum conditions for pre-basic seed potatoes
Article 2
1
Member States shall ensure that pre-basic seed potatoes satisfy the following minimum conditions:
a
they derive from mother plants which are free from the following harmful organisms: Pectobacterium spp., Dickeya spp., Potato leaf roll virus, Potato virus A, Potato virus M, Potato virus S, Potato virus X, and Potato virus Y;
b
they are free from symptoms of blackleg;
c
the number of growing plants not breeding true to the variety and the number of plants of a different variety together, shall not exceed 0,01 %;
d
in the direct progeny, the number of plants showing symptoms of virus infection shall not exceed 0,5 %;
e
the number of growing plants with mosaic symptoms or symptoms caused by leaf roll virus shall not exceed 0,1 %;
f
the maximum number of field generations shall be four.
2
Member States shall provide that pre-basic seed potatoes may be marketed as ‘Union grades PBTC’ and ‘Union grade PB’, in accordance with the conditions set out in the Annex.
3
Compliance with the requirements of paragraph 1(b), (c) and (e) shall be established through official field inspections. In case of doubt, those inspections shall be supplemented by official tests on leaves.
Where methods of micro-propagation are used, compliance with point 1(a) shall be established by official testing, or testing under official supervision, of the mother plant.
Where methods of clonal selection are used, compliance with point 1(a) shall be established by official testing, or testing under official supervision, of the clonal stock.

Minimum conditions for lots of pre-basic seed potatoes
Article 3
Member States shall provide that lots of pre-basic seed potatoes shall satisfy the following minimum conditions:
1. presence of earth and extraneous matter shall not exceed 1,0 % by mass;
2. the number of potatoes affected by rots, other than ring rot or brown rot, shall not be present in a quantity exceeding 0,2 % by mass;
3. the number of potatoes with external blemishes, including misshapen or damaged tubers, shall not exceed 3,0 % by mass;
4. the number of potatoes affected by common scab over more than one third of their surface, shall not exceed 5,0 % by mass;
5. the number of potatoes affected by black scurf over more than 10,0 % of their surface, shall not exceed 1,0 % by mass;
6. the number of potatoes affected by powdery scab over more than 10,0 % of their surface, shall not exceed 1,0 % by mass;
7. shrivelled tubers due to excessive dehydration or dehydration caused by silver scurf, shall not exceed 0,5 % by mass;
8. the total number of potatoes, as referred to in points (b) to (g), shall not exceed 6,0 % by mass.

Transposition
Article 4
1
Member States shall adopt and publish, by 31 December 2015 at the latest, the laws, regulations and administrative provisions necessary to comply with this Directive. They shall forthwith communicate to the Commission the text of those provisions.
They shall apply those provisions from 1 January 2016.
When Member States adopt those provisions, they shall contain a reference to this Directive or be accompanied by such a reference on the occasion of their official publication. Member States shall determine how such reference is to be made.
2
Member States shall communicate to the Commission the text of the main provisions of national law which they adopt in the field covered by this Directive.

Entry into force
Article 5
This Directive shall enter into force on the twentieth day following that of its publication in the Official Journal of the European Union.

Addressees
Article 6
This Directive is addressed to the Member States.
Done at Brussels, 6 February 2014.
For the Commission
The President
José Manuel Barroso