If it is repeatedly found, during post-control tests carried out in the field, that seed of any one variety does not adequately satisfy the conditions laid down in respect of varietal identity or varietal purity, Member States shall ensure that the person marketing it is wholly or partially forbidden to market such seed (where appropriate, for a specified period).

Any measures taken under paragraph 1 shall be withdrawn as soon as it has been established with adequate certainty that the seed intended for marketing will in future satisfy the conditions as to varietal identity and varietal purity.