1.Member States shall prescribe that seed potatoes shall meet the requirements of Directive 77/93/EEC and shall derive in direct line from potato material obtained under an officially approved programme which has been found free of the organism in official or officially supervised testing using the relevant method set out in Annex II.
The aforesaid testing shall be carried out by a Member State:
(a)in cases where there have been confirmed finding(s) of the organism in their own seed potato production,
by testing of the earlier propagations, including the initial clonal selection and systematic testing of basic seed potato clones; or
in cases where it has been established that there is no clonal relationship, by testing of all basic seed potato clones or earlier propagations including the initial clonal selection, and
(b)in other cases, either on each plant of the initial clonal selection or on representative samples of the basic seed potatoes or earlier propagations.
2.The following provisions may be adopted in accordance with the procedure laid down in Article 16a of Directive 77/93/EEC:
the detailed rules of application of paragraph 1, second subparagraph, point (a),
the rules concerning the representative samples provided for in paragraph 1, second subparagraph, point (b).